Owner`s manual | Garmin 190-01183-03-0B GPS Receiver User Manual

GPSMAP 198C Sounder
®
chartplotting receiver
owner’s manual
© Copyright 2005 Garmin Ltd. or its subsidiaries
Garmin International, Inc.
1200 East 151st Street,
Olathe, Kansas 66062, U.S.A.
Tel. 913/397.8200 or 800/800.1020
Fax 913/397.8282
Garmin (Europe) Ltd.
Unit 5, The Quadrangle,
Abbey Park Industrial Estate,
Romsey, SO51 9DL, U.K.
Tel. 44/0870.8501241
Fax 44/0870.8501251
Garmin Corporation
No. 68, Jangshu 2nd Road, Shijr,
Taipei County, Taiwan
Tel. 886/2.2642.9199
Fax 886/2.2642.9099
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supplemental information concerning the use and operation of this and other Garmin products.
Garmin®, GPSMAP®, AutoLocate®, TracBack®, BlueChart®, and MapSource® are registered trademarks of Garmin Ltd. or its subsidiaries and may not be used
without the express permission of Garmin.
July 2005
Part Number 190-00541-00 Rev. B
Printed in Taiwan
INTRODUCTION > ABOUT THIS MANUAL
INTRODUCTION
Thank you for choosing the Garmin® GPSMAP® 198C Sounder.
The GPSMAP 198C Sounder utilizes the proven performance of
Garmin GPS and full-featured mapping to create an unsurpassed
portable GPS receiver. Take a moment now to compare the contents
of this package with the packing list on the outside of the box. If
any pieces are missing, contact your Garmin dealer immediately.
Before you begin working with the GPSMAP 198C Sounder,
review the installation instructions listed in the Appendix. If
you have any question about installing your chartplotter, contact
Garmin Product Support or a professional installer.
The GPSMAP 198C Sounder Quick Reference Guide contains
helpful tips on using the unit and performing various navigation
tasks. It’s a good idea to keep the Quick Reference Guide nearby
whenever you are operating your new GPSMAP 198C Sounder.
About This Manual
To get the most out of your new navigation system, take time to
read this manual and learn the operating procedures for your unit in
detail. This manual is organized into the following chapters.
The Introduction section contains the Table of Contents as well as
GPSMAP 198C Sounder care information.
The Basic Operation section provides you with detailed
information and step-by-step directions for features such as using
the Find Menu, navigating a route, and using waypoints.
The Main Pages section provides detailed explanations about each
page in the GPSMAP 198C Sounder and step-by-step directions on
using the pages.
The Main Menu section provides detailed explanations about the
Main Menu and how to use it to configure your unit.
The Appendix contains installation instructions, specifications,
optional accessories, and maintenance information. You can also
find warranty and FCC information in the Appendix. Read the
Safety Information to learn how to install and use your Garmin
GPSMAP 198C Sounder safely and responsibly.
An Index is provided at the end of the manual for reference.
GPSMAP 198C Sounder Owner’s Manual
i
INTRODUCTION > TABLE OF CONTENTS
Table of Contents
Introduction...........................................................................i
About This Manual ................................................................... i
Warning ................................................................................... iv
Caution .................................................................................... iv
Basic Operation ...................................................................1
Initializing the Receiver .......................................................... 1
Simulator Mode ....................................................................... 3
Adjusting the Backlight .......................................................... 4
Interface Keys .......................................................................... 5
Entering Data and Selecting Options .................................... 6
Using the Map Pointer ............................................................ 7
Creating and Using Waypoints .............................................. 8
Man OverBoard (MOB) .......................................................... 10
Reviewing and Editing Waypoints ....................................... 11
Navigating to a Destination .................................................. 12
Routes .................................................................................... 17
Find ........................................................................................ 19
Additional Information .......................................................... 21
DSC ......................................................................................... 22
Main Pages .........................................................................26
Map Page................................................................................ 27
Compass Page....................................................................... 33
Numbers Page ....................................................................... 34
Highway Page ........................................................................ 35
Active Route Page ................................................................. 37
ii
Main Menu ..........................................................................39
GPS Tab .................................................................................. 39
Tide Tab .................................................................................. 43
Trip Tab ................................................................................... 46
Celes (Celestial) Tab ............................................................. 47
Points Tab .............................................................................. 48
Routes Tab ............................................................................. 53
Track Tab ................................................................................ 59
DSC Tab .................................................................................. 61
Card Tab ................................................................................. 62
Time Tab ................................................................................. 62
Pages Tab ............................................................................... 63
Map Tab .................................................................................. 64
Hiway (Highway) Tab ............................................................. 68
Temp (Temperature) Tab ....................................................... 68
Sonar Tab ............................................................................... 68
Systm (System) Tab .............................................................. 69
Units Tab ............................................................................... 70
Comm (Communications) Tab ............................................. 72
Alarm Tab ............................................................................... 76
Using Sonar .......................................................................78
Sonar Page............................................................................. 78
Sonar Tab Options ................................................................ 85
Understanding Sonar ............................................................ 89
GPSMAP 198C Sounder Owner’s Manual
INTRODUCTION > TABLE OF CONTENTS
Appendix ............................................................................92
Specifications ........................................................................ 92
Installing the GPSMAP 198C Sounder ................................ 93
Mounting the GPSMAP 198C Sounder ................................ 94
Installing the Transducer ...................................................... 96
Care Information.................................................................... 98
Connecting the Power/Data Cable ....................................... 99
Interfacing ............................................................................ 100
Installing and Removing Data Cards ................................. 101
Satellite Information ............................................................ 102
What is WAAS?.................................................................... 103
What is Differential GPS (DGPS)? ..................................... 103
What is a Maritime Mobile Service Identity (MMSI)? ........ 104
How ARE MMSI assignments obtained? ........................... 104
Navigation Terms ................................................................ 105
Messages ............................................................................. 107
LORAN TD System .............................................................. 109
Optional Accessories ...........................................................111
Software License Agreement ............................................. 112
Product Registration ........................................................... 112
Limited Warranty ................................................................. 113
FCC Compliance.................................................................. 114
Index .................................................................................115
GPSMAP 198C Sounder Owner’s Manual
iii
INTRODUCTION > WARNINGS AND CAUTIONS
Warning
Failure to avoid the following potentially hazardous situations could
result in an accident or collision resulting in death or serious injury.
When navigating, carefully compare information displayed on the
GPSMAP 198C Sounder to all available navigation sources, including
information from visual sightings, and maps. For safety, always resolve any
discrepancies or questions before continuing navigation.
Use the electronic chart in the GPSMAP 198C Sounder only to facilitate,
not to replace, the use of authorized government charts. Official
government charts and notices to mariners contain all information needed
to navigate safely.
WARNING: This product, its packaging, and its components contain chemicals known to the State of California to cause cancer, birth defects, or reproductive
harm. This Notice is being provided in accordance with California’s Proposition 65. If you have any questions or would like additional information, please refer
to our Web site at http://www.garmin.com/prop65.
Caution
Failure to avoid the following potentially hazardous situations may
result in injury or property damage.
Use the GPSMAP 198C Sounder only as a navigational aid. Do not
attempt to use the GPSMAP 198C Sounder for any purpose requiring
precise measurement of direction, distance, location, or topography.
The Global Positioning System (GPS) is operated by the United States
government, which is solely responsible for its accuracy and maintenance.
The government’s system is subject to changes which could affect the
accuracy and performance of all GPS equipment, including the GPSMAP
198C Sounder. Although the GPSMAP 198C Sounder is a precision
navigation device, any navigation device can be misused or misinterpreted
and, therefore, become unsafe.
Map Data Information: One of the goals of Garmin is to provide customers with the most complete and accurate cartography that is available to us at a
reasonable cost. We use a combination of governmental and private data sources, which we identify in product literature and copyright messages displayed to the
consumer. Virtually all data sources contain inaccurate or incomplete data to some extent. This is particularly true outside the United States, where complete and
accurate digital data is either not available or prohibitively expensive.
iv
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > INITIALIZING THE RECEIVER
BASIC OPERATION
Initializing the Receiver
The first time you turn on the GPSMAP 198C Sounder, the receiver
must be given an opportunity to collect satellite data and establish
its present location. To ensure proper initialization, the GPSMAP
198C Sounder is shipped from the factory in AutoLocate Mode.
Before you initialize, make sure the GPSMAP 198C Sounder unit
and antenna are correctly installed on your vessel according to the
instructions in the “Appendix.” Install the antenna in a location
with a clear and unobstructed view of the sky.
A full-screen GPS Information Page is shown after you press
ENTER to acknowledge the Warning Page. The page goes away
after the unit gets a position fix or you press either ENTER or
QUIT. The page can be disabled and enabled on the
Main Menu—Pages tab (see page 63).
To turn on the GPSMAP 198C Sounder:
1. Press and hold the POWER key until the power tone
sounds, then release the POWER key. The Warning Page
appears while the unit conducts a self-test.
2. When the self-test is complete, press ENTER to agree and
acknowledge the warning.
The GPS Information Page appears as the receiver begins acquiring
satellites.
To turn off the GPSMAP 198C Sounder:
1. Press and hold the POWER key for about two seconds,
until the screen is blank.
2. When the screen is blank, release the POWER key.
GPSMAP 198C Sounder Owner’s Manual
1
BASIC OPERATION > INITIALIZING THE RECEIVER
To graphically initialize the GPSMAP 198C Sounder:
1. Press MENU twice for the Main Menu. Press up or down
on the ROCKER until the GPS tab is highlighted, and then
press MENU once.
2. Using the ROCKER, highlight Initialize Position, and press
ENTER. The Initialize Position Page appears, prompting
you to select your approximate location with the map
pointer.
3. Use the ROCKER to move the map pointer to your
approximate location within 200 miles. If you have difficulty
identifying your location, press and release the IN key to
see the next lower map range.
4. After you have determined your approximate location on the
map, press ENTER.
NOTE: This does not calibrate the unit in any way, but
rather helps to speed up the initial satellite acquisition. If the
unit shows “Ready 2D or 3D” during this process, it is not
necessary to initialize the unit.
2
The unit now begins searching for the appropriate satellites for
your region and should acquire a fix within a few minutes. When
viewing the GPS tab on the Main Menu, a signal strength bar for
each satellite in view appears on the bottom of the page, with the
appropriate satellite number under each bar.
• No signal strength bars—the receiver is looking for the
satellites indicated.
• Hollow signal strength bars—the receiver has found the
indicated satellite(s) and is collecting data.
• Solid signal strength bars—the receiver is ready to use.
When the receiver has collected information from at least three
satellites, the top of the screen shows either “Ready 2D or 3D”, and
the GPSMAP 198C Sounder is ready for use.
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > SIMULATOR MODE
Simulator Mode
Simulator Mode turns the GPS receiver off for use indoors or
practice. Any of the functions discussed in the following pages
can be performed in Simulator Mode. While in Simulator Mode, a
“Running Simulator” message appears after 2 minutes of inactivity.
Keep in mind that the GPSMAP 198C Sounder does not track
satellites in Simulator Mode, and this mode should never be
used for actual navigation. All the waypoint and route planning
completed in Simulator Mode is retained in memory for future use.
WARNING: Do not attempt to navigate using Simulator Mode.
When the unit is set to Simulator Mode, the GPS receiver is
turned off. Any satellite signal strength bars shown are only
simulations and do not represent the strength of actual satellite
signals.
GPSMAP 198C Sounder Owner’s Manual
To place the GPSMAP 198C Sounder in
Simulator Mode:
1. Press MENU twice to show the Main Menu. Press up or
down on the ROCKER until the GPS tab is highlighted, and
then press MENU once.
2. Use the ROCKER to highlight Start Simulator, and press
ENTER. Choose No to the retail demonstration, and press
ENTER.
3. Press ENTER to confirm the Running Simulator message
that appears at the bottom of the screen. “Simulating”
appears at the top of each of the Main Pages.
4. To turn off the Simulator Mode, press MENU, and select
Stop Simulator.
3
BASIC OPERATION > ADJUSTING THE BACKLIGHT
To adjust the simulated speed and heading from the
Compass or Highway Pages:
The Set Position,
Track Control, Track
and Speed fields
only show while in
Simulator Mode.
1. Press up on the ROCKER increase the speed in
10 knot/kph/mph increments. Press down on the ROCKER
to decrease the speed in the same increments.
2. Press left and right on the ROCKER to steer the boat.
Adjusting the Backlight
The Sounder’s adjustable screen backlighting is controlled with the
POWER key, and can be adjusted from any page.
To enter a simulated speed and heading from the
Main Menu:
1. Press MENU twice to show the Main Menu.
2. Use the ROCKER to highlight the Systm tab, press
right then down until the field below the word Speed is
highlighted, then press ENTER.
3. Use the ROCKER to enter a speed, and press ENTER.
4. Use the ROCKER to highlight Track Control. Press
ENTER, and select a heading.
5. Press ENTER to finish, and QUIT until you return to the
Map Page.
4
To adjust the backlighting:
1. Press and release the POWER key. The adjustment slider
window appears.
2. Press the POWER key again and the user-defined level of
backlighting starts. You can adjust this level by pressing up
or down on the ROCKER. If you press POWER one more
time, the backlight is at the maximum setting.
3. Press ENTER or QUIT when finished.
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > INTERFACE KEYS
Interface Keys
POWER Key
• Press and hold to turn the unit on or off.
• Press and release to adjust backlighting.
PAGE Key
• Press to cycle through the main pages.
• Press to end an operation in progress and
return to the main page.
QUIT Key
• Press and release to cancel data entry or
exit a page.
ENTER/MARK Key
• Press and release to enter highlighted options
and data or confirm on-screen messages.
• Press and hold at any time to mark your
current location as a waypoint.
MOB Key
• Press and hold for MOB waypoint.
GPSMAP 198C Sounder Owner’s Manual
IN/OUT Zoom Keys
• From the Map Page, press to zoom
in or out.
• From any other page, press to scroll up or
down a list.
ROCKER Key
• Move up, down, right or left to move
through lists, highlight fields, on-screen
buttons and icons, enter data, or move the
map pointer.
MENU Key
• Press and release to view options for a page.
• Press twice to view the Main Menu.
NAV Key
• Press and release at any time to
view the Navigation Menu.
FIND Key
• Press to search for points such as user
waypoints, cities, and services.
5
BASIC OPERATION > ENTERING DATA AND SELECTING OPTIONS
Entering Data and Selecting Options
You can select and start options, and enter data to customize the
GPSMAP 198C Sounder to fit your requirements. Use the ENTER
key and the ROCKER to select options, enter names and numbers
in data fields, and start your selections.
To select an on-screen button:
Some pages contain on-screen buttons. As shown below,
the New Waypoint Page has three buttons: Map, Delete,
and OK. To start, highlight the a button, and press ENTER.
To select an optional feature:
1. With any page shown, press MENU to show the options
menu. The options menu shows a list of optional features
that are specific for that page. To select an option requires
movement of the cursor. This is referred to as highlighting,
selecting, or choosing an item.
2. Use the ROCKER to move the cursor (highlight) up and
down a list or up, down, left, and right on menus.
3. After you have highlighted a selection, press ENTER to
either start the feature or press MENU to show a sub-menu
or list with more options. Repeat this process to select an
option from the list, or press QUIT to return to the previous
setting.
6
On-Screen Buttons
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > USING THE MAP POINTER
Using the Map Pointer
Working from the Map Page centers around the use of the pointer.
Controlled by the ROCKER, the pointer is used to pan to map
locations, mark and edit waypoints and routes, and review position
data of on-screen map items and waypoints. When you move the
pointer over a map item, a highlighted description of that item
appears.
To pan the map:
1. Use the IN/OUT keys to select a map zoom range.
2. Use the ROCKER to move the pointer. A data field appears
at the top of the screen showing the bearing and distance
from your boat to the pointer, along with the latitude/
longitude of the pointer.
3. Press QUIT to re-center your boat on the Map Page.
Distance
Bearing
Pointer Coordinates
Current
location
Map Pointer
Map Zoom Range
The Map Page actively scrolls or pans enabling you to explore
areas around the world and create waypoints and routes. Pressing
QUIT returns the map to your present location.
NOTE: When the pointer reaches the edge of the map, the unit
can pause as it loads new map data.
GPSMAP 198C Sounder Owner’s Manual
7
BASIC OPERATION > CREATING AND USING WAYPOINTS
Creating and Using Waypoints
The Garmin GPSMAP 198C Sounder stores up to 3,000
alphanumeric waypoints with a user-defined symbol, comments,
and depth available for each waypoint. Waypoints can be created
using two basic methods:
ENTER/MARK Key—marks your present location, and provides
options to select a map position or map item from the Map
Page. Also, you can enter a new waypoint’s location coordinates
manually.
Graphically—defines a new waypoint location from the Map Page
using the ROCKER.
8
ENTER/MARK Key
The GPSMAP 198C Sounder’s ENTER/MARK key quickly
captures your present location to create a new waypoint. The unit
must have a valid position (2D or 3D) fix to mark your present
location. You can also use this option to manually enter waypoint
coordinates.
To mark your present position:
1. Press and hold ENTER/MARK until the New Waypoint
window appears. A default three-digit name and symbol are
created for the new waypoint.
2. To accept the waypoint with the default name and symbol,
highlight OK, and press ENTER/MARK.
3. To enter a different name, highlight the name field, and
press ENTER/MARK. Use the ROCKER to enter the new
letter/numbers, and press ENTER/MARK when finished.
You can use up to 10 characters for the name.
4. To select a different symbol, highlight the symbol field to
the left of the name, and press ENTER/MARK. Use the
ROCKER to highlight the new symbol, and press
ENTER/MARK.
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > CREATING AND USING WAYPOINTS
5. To enter optional comments or a depth, highlight the
Comments or Depth field to the right of the location
coordinates, and press ENTER/MARK, use the ROCKER to
enter a value, and press ENTER/MARK.
6. To manually enter a set of coordinates, highlight the
coordinates, and press ENTER/MARK, use the ROCKER to
enter the new coordinates, and press ENTER/MARK when
finished.
7. Use the ROCKER to highlight OK. When finished, press
ENTER/MARK to save the waypoint into memory.
Creating Waypoints Graphically
You create waypoints graphically from the Map Page. To mark
a map location or map item, select the location or item with the
pointer, and press ENTER. When selecting a location or map
item, a description of the point, its distance and bearing from your
current location, and the latitude/longitude of the pointer is shown
along the top of the map.
GPSMAP 198C Sounder Owner’s Manual
To create a new waypoint graphically:
1. Use the ROCKER to move the pointer to a map location. If
you want to create the new waypoint at an on-screen map
item, highlight the map item on the screen.
2. Press and release ENTER/MARK to capture the pointer
location. Do not hold the button down, doing so marks your
present location, not the map location.
If you are not using a map item to create a waypoint, go to
step 4.
3. Highlight Create Wpt or OK, and press ENTER/MARK.
4. To accept the waypoint with the default name and symbol,
press ENTER/MARK.
5. To change the name, symbol, or add a comment or depth,
highlight the appropriate field, and press ENTER/MARK.
Make your changes, and press ENTER/MARK when
finished.
6. Move the highlight back to OK, and press ENTER/MARK to
confirm the changes.
9
BASIC OPERATION > MAN OVERBOARD (MOB)
Man OverBoard (MOB)
The GPSMAP 198C Sounder’s Man OverBoard function (MOB)
simultaneously mark and set a course back to the marked location
for quick response to emergency situations.
The MOB function allows you to quickly start
navigation back to a location.
When a MOB is active, a MOB waypoint with an international
MOB symbol is created and the unit is on an active navigation to
that point. Use any of the Navigation Pages to guide you back to
the MOB point. The MOB waypoint is stored in the waypoint list
and works like any other waypoint.
To stop navigation, highlight
Stop Navigation, and press ENTER.
To start the MOB function:
1. Press MOB.
2. Press ENTER to begin navigating to the MOB location.
3. To stop navigation to the MOB location, press NAV,
highlight Stop Navigation, and press ENTER.
10
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > REVIEWING AND EDITING WAYPOINTS
Reviewing and Editing Waypoints
Waypoints are reviewed, modified, renamed, moved, or deleted at
any time through the Waypoint Edit Page. The Waypoint Edit Page
is available for any stored waypoint. Select the waypoint on the
map or from the waypoint lists in the Main Menu—Points tab.
3. From the Waypoint Edit Page, change the name, symbol,
comment, location coordinates, or depth for the selected
waypoint. When finished, highlight Next, and press ENTER
to save them or press QUIT.
Symbol
Sub Tabs
Name
Coordinates
Comment
Depth
Waypoint List
Waypoint Edit Page
To access the Waypoint Edit Page:
1. Use the ROCKER to highlight the waypoint on the Map
Page.
Or
Press MENU twice, highlight the Points tab, and choose a
waypoint from the User or Proximity sub tabs.
2. Press ENTER to show the Waypoint Edit Page.
GPSMAP 198C Sounder Owner’s Manual
To change the waypoint name:
1. Highlight the waypoint name field, and press ENTER.
2. Use the ROCKER to enter a new name, and press ENTER
when finished.
11
BASIC OPERATION > NAVIGATING TO A DESTINATION
To change the waypoint symbol:
1. Highlight the waypoint symbol field to the left of the
waypoint name, and press ENTER.
2. Use the ROCKER to select a new symbol, and press
ENTER.
To change the Comment, Location, Coordinates,
or Depth:
1. Highlight a field, and press ENTER.
2. Use the ROCKER to edit or enter the data. To move to the
next line, press right on the ROCKER.
3. Press ENTER when finished.
To move the waypoint on the map:
Navigating to a Destination
Using the Nav Key
The NAV key provides three ways to navigate to a destination:
Go To Point, Follow Route, and Follow Track (TracBack). When
you are actively navigating, the Map Page shows a straight line
from your current location to the destination. The Go To option is
the easiest method for selecting a destination. A Go To allows you
to select a destination point and quickly set a direct course from
your present location. If you have a point highlighted on a list or
the map, Go To <point name> appears in addition to Go To Point.
The Go To function is accessed from any list of points or
graphically from the Map Page.
1. From the Waypoint Edit Page, highlight Show Map, and
press ENTER. Highlight the waypoint, and press ENTER.
A MOVE label now appears under the pointer arrow in
addition to a distance, bearing, and coordinate window. You
can also use the IN and OUT keys to zoom the map. The
map zoom range appears in the lower right corner.
2. Use the ROCKER to point to the new location, and press
ENTER.
3. To stop the move process, press QUIT.
12
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > NAVIGATING TO A DESTINATION
To start a Go To from a point list:
1. Press NAV. Highlight Go To Point, and press ENTER.
2. From the Find menu, highlight Waypoints or another menu
option, and press ENTER.
3. To select a waypoint from the waypoint lists, use the
ROCKER to highlight either the By Name or Nearest tab,
select a waypoint, and press ENTER.
Or
Select a waypoint from the map, highlight either the User
or Nearest tab, and press MENU. With Select From Map
highlighted, press ENTER. Use the zoom IN and OUT keys
and the ROCKER to select a waypoint, and press ENTER.
Selecting a Go To Graphically
A graphical Go To can be used to select one of three items from
the Map Page: an existing waypoint, an on-screen map item such
as roads, rivers, cities, and navaids, or a new map point. If you are
selecting a map item as the Go To destination, the GPSMAP 198C
Sounder automatically uses the name of the map item, but the
point is not stored in the waypoint list. See page 21 for creating
waypoints using map items. If you are selecting a new map point
(non-map item) as the Go To destination, the GPSMAP 198C
Sounder automatically creates a waypoint at the pointer location.
To start an existing waypoint or map item as a
Go To from the Map Page:
1. Use the ROCKER to highlight the waypoint or on-screen
map item, and press NAV. Go To <waypoint name>
appears, then press ENTER.
Or
Highlight the waypoint or map item, and press ENTER.
2. Highlight the Go To button at the bottom of the window, and
press ENTER.
GPSMAP 198C Sounder Owner’s Manual
13
BASIC OPERATION > NAVIGATING TO A DESTINATION
To Go To a new map point (non-map item):
1. Use the ROCKER to move the map pointer to the location.
2. Press NAV.
3. With Go To MAP Point highlighted, press ENTER.
TracBack Navigation (Navigating a Track)
The TracBack function retraces your path using the track log
automatically stored in the receiver’s memory. This feature
eliminates the need to store waypoints along the way. TracBack
routes are created by reducing your track log into a route of up to
254 turns and activating an inverted route along those points. When
started, a TracBack route leads you back to the oldest stored track
log point, so it is a good idea to clear the existing track log before
you start your current trip.
You must save a track before using the Follow Track option.
14
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > NAVIGATING TO A DESTINATION
To clear the track log and define a starting point for a
TracBack route:
1. Press MENU twice to show the Main Menu.
2. Using the ROCKER, highlight the Track tab, then highlight
the Active sub tab.
3. Use the ROCKER to select the Erase button, and press
ENTER.
4. Highlight the OK, and press ENTER.
You must save the track log before you can use Follow Track. The
Save feature stores up to 15 track logs.
To save a track log:
1. From the Main Menu, use the ROCKER to highlight the
Track tab, then highlight the Active sub tab to the right.
2. Use the ROCKER to select Save, and press ENTER.
3. From the Save Back Through window, highlight time,
date, or Entire Log, and press ENTER. When the track is
saved, the Save Track window appears. The default name,
distance, number of points (500 max), and color are shown
in the Save Track window.
To change the name of the saved track, highlight the name
field, and press ENTER. Make your changes and press
ENTER.
GPSMAP 198C Sounder Owner’s Manual
To show the track on the Map and Highway Pages, highlight
the check box to the left of Show on Map and Highway,
and press ENTER.
To view the track on the map, highlight Review on Map, and
press ENTER.
4. Highlight OK, and press ENTER to save the track. Press
QUIT to exit.
Default Track Name
Total number of points
Total Distance
Check this box to
show track
Change color
of track line
15
BASIC OPERATION > NAVIGATING TO A DESTINATION
To start a TracBack using the NAV key:
1. Press NAV, highlight the Follow Track, and press ENTER.
2. Highlight the track you want to follow, and press ENTER.
3. Choose Original to navigate from the start to the end of
your trip, or Reverse to navigate from the end to the start of
your trip, and press ENTER.
4. To stop TracBack navigation, press NAV, highlight Stop
Navigation, and press ENTER.
When a TracBack is active, the GPSMAP 198C Sounder takes the
track log currently stored in memory and divides it into segments
called legs. Up to 254 temporary turns (BEGIN, TURN 1, TURN
2, TURN 3,...., TURN X, END) are created to mark the most
significant features of the track log in order to duplicate your exact
path as closely as possible. To get the most out of the TracBack
feature, remember the following tips:
• If the track log interval is set to the Time option, the route
can not follow your exact path. For best performance, keep
the interval set to resolution.
• If the receiver is turned off or satellite coverage is lost during
your trip, the TracBack draws a straight line between any
point where coverage was lost and where it resumed.
• If the track log’s changes in distance and direction are too
complex, 254 waypoints can not mark your path accurately.
The receiver then assigns the 254 waypoints to the most
significant points of your track, and simplifies segments with
fewer changes in direction.
For more information on setting up the Track options and saved
tracks, see pages 59.
• Always clear the track log at the starting point.
• Set the Record Mode option on the track log setup page to
Fill or Wrap.
• The track log memory must contain at least two points to
create a TracBack route.
16
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > ROUTES
Routes
To create a route using the Route Edit Map Page:
You can create and store up to 50 user-defined reversible routes
(numbered 1-50), with up to 254 waypoints each. Routes are
created and modified in two ways. The first method creates the
route using a Map Page. This method selects points on the map.
The second method enters the waypoint names as text on the Route
Review Page. This method lists the waypoints as you create the
route. All of the route functions are accessed through the Main
Menu or the NAV key.
Route Tab
GPSMAP 198C Sounder Owner’s Manual
1. Press MENU twice to show the Main Menu.
2. Use the ROCKER to highlight the Route tab, and press
MENU to show the route options page, or highlight the first
available blank route slot, and press ENTER. (Skip to step 4
if you use this method.)
3. Select New Route, and press ENTER.
4. To add an existing waypoint or map item to the route, use
the map pointer to select a waypoint or map item, and press
ENTER. Map items do not appear in the waypoint list. To
create a waypoint from a map item, see page 21.
5. To add a new waypoint to the route, use the map pointer
to select a map location, and press ENTER. Press ENTER
again to confirm the new waypoint. You can also change the
name and symbol of the new waypoint (see page 8).
As you add each new waypoint to the route, the data
window at the top of the Map Page shows the waypoint/
map item name, bearing and distance from your location,
and coordinates of the pointer. The bottom of the screen
shows the number of available and used points. A route line
appears on the map to indicate each completed leg, and a
dotted line appears indicating the distance and bearing to
the arrow pointer from the last route waypoint.
17
BASIC OPERATION > ROUTES
6. Repeat steps 4 and 5 until you have finished defining all
route waypoints.
7. When finished, press QUIT twice to return to the Route List
Page. Highlight Edit as Text, and press ENTER to return to
the Route Review Page.
To create a route using text on the Route
Review Page:
1. Press MENU twice to show the Main Menu.
2. Use the ROCKER to highlight the Route tab, and press
MENU to show the route options menu, or highlight the first
available blank route slot, and press ENTER. (Skip to step 4
if you use this method.)
3. Select New Route, and press ENTER.
4. Press MENU, select Edit as Text, and press ENTER.
5. Use the ROCKER to highlight the first field under the word
Waypoint, and press ENTER.
ADD appears below the
pointer as you insert points.
Choose the category you want to
add a route point from.
18
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > FIND
6. From the Find menu, highlight Waypoints or another
menu item, and press ENTER. From either the By Name
or Nearest tab lists, choose a waypoint, and press ENTER.
(See page 50 for searching for waypoints by name.)
7. From the Waypoint Review Page, OK is automatically
highlighted. You can use Show Map to view a point on the
map. When finished viewing, then press QUIT to return to
the Waypoint Review Page. Press ENTER to add the point
to the route. The next field automatically highlights.
8. Repeat steps 5-7 until all the route points have been
entered. Press QUIT to return to the Route List Page.
Find
The FIND key searches the unit for user waypoints, map items,
and any optional BlueChart or MapSource information loaded on
a data card. Press FIND to show a list of available find categories.
The default items are Waypoints, Cities, Tide Stations, and
Transportation. Additional items, such as Anchorages, Businesses,
Exits, Navaids, Restricted Areas, and Wrecks Obstructions, appear
if an optional BlueChart data card inserted into the unit. If you
press FIND and are in Pan Mode, the unit centers its search from
the location where the map pointer is located. Your location or
the map pointer must be within a map outline area to search for
BlueChart information.
Choose a waypoint from either the
By Name or Nearest tab list.
Find Items List
GPSMAP 198C Sounder Owner’s Manual
19
BASIC OPERATION > FIND
To Find an item from your current location:
1. From any page, press FIND.
2. Using the ROCKER, highlight a category from the list, and
press ENTER.
3. For Waypoints and Cities, search using By Name or
Nearest. Use the ROCKER to highlight a tab. For By
Name, use the top field to spell out the name, or scroll down
through the list. (See page 8 for steps on entering a name.)
To Find an item from other locations:
1. From the Map Page, use the ROCKER to pan select a
location, and press FIND.
2. Using the ROCKER, highlight a category from the list, and
press ENTER.
You can also Find
from items found on
the Find List.
20
The Find option also supports a “find from” feature that centers
your search around an item you have just found. For example,
you search for “Restricted Areas” and you find a point named
“Anchoring Prohibited.” If you press FIND again, “From
Anchoring Prohibited” appears as the new search from point.
You can also use the Find feature to center your search from any
waypoint, route list entry, map item, or tide station. Highlight the
item you want to find from and press FIND.
• Nearest To Boat—centers search from your boat’s current
location.
• Nearest To Other—centers your search around another map
location.
• Nearest To Next—centers search from the next point of your
active route.
• Nearest To Destination—centers search from the last point
of your active route.
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > ADDITIONAL INFORMATION
To Find an item using the Find options:
1 From any page, press FIND.
2. Using the ROCKER, highlight a category from the list, and
press ENTER.
3 From the search results list, press MENU, highlight an
option, and press ENTER.
Additional Information
Items located using the Find feature have information about the
point available. The information varies depending on the type of
data loaded on the optional data card. Sub tabs along the top of the
detail window contain the information available for the item. Any
additional options are shown along the bottom.
To view additional information for a Find item:
1. From the Find list, highlight an item, and press ENTER.
2. Use the ROCKER to highlight the individual tabs, and show
the information. To scroll the text, highlight the field, and
press ENTER. Use the ROCKER to scroll.
Or
Press MENU, and choose a scroll option.
Find Menu Options
Additional
Information Tabs
Distance, Bearing,
and Coordinates of
item
Additional Options
Information Window
GPSMAP 198C Sounder Owner’s Manual
21
BASIC OPERATION > DSC
DSC
The DSC Page of the Main Menu controls and sets up the Digital
Selective Calling (DSC) features on the GPSMAP 198C Sounder.
Digital Selective Calling (DSC) uses marine VHF radio and
Global Positioning System (GPS) technologies to transmit and
receive location information. The chartplotter repeats the call
properties received from the VHF radio on the chartplotter. The
GPSMAP 198C Sounder requires input from a DSC enabled VHF
radio to show position, and sound/show alerts from a Distress
Call or Position Report. Conversely, the VHF radio requires input
from a GPS to transmit position coordinates for a Distress Call or
Position Report. For connection information, refer to “Connecting
the Power/Data Cable” on page 99.
An emergency DSC Distress Call allows a vessel in trouble
to transmit a substantial amount of information in a single
transmission or call, without the need for voice communication.
When any nearby rescuer receives the DSC signal, an alarm sounds
and they immediately receive the location of the caller. The rescuer
can choose to navigate to the caller’s location to assist, or forward
the call on to the Coast Guard. When the Coast Guard receives the
call, they can immediately access the caller’s information (such as
who they are and the type of vessel) in their database while they
are in transit to the caller’s location.
22
A non-emergency DSC Position Report allows mariners to
exchange and show the positions of one another. When a DSC
position is received, the mariner can choose to create a waypoint or
to show the received location on an electronic map.
Anytime a vessel receives a DSC call, they can store and quickly
navigate to that location using a Go To. In order to use DSC, users
must first register their VHF radio with the FCC and receive a
Maritime Mobile Service Identity (MMSI) number. Garmin does
not provide MMSI numbers.
For more information about Digital Selective Calling and Maritime
Mobile Service Identity (MMSI) numbers, refer to page 104 in the
“Appendix.”
Understanding Distress Calls
When the GPSMAP 198C Sounder receives a Distress Call
from a connected DSC enabled VHF radio, an alert message and
notification page are shown, and an alarm tone is sounded. Distress
Calls are shown in the DSC Call List, and Log with a checkered
symbol.
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > DSC
Understanding Position Reports
A Position Report is similar to a Distress Call except no alarm is
sounded. Position Reports are not broadcast to all DSC users and
are shown with a boat symbol.
Receiving DSC Calls
Each time you receive a Distress Call or Position Report, a
Notification Page is shown, and the call is placed in the DSC Call
List and Log. The Notification Page contains information about
the call including: the type of call (distress or position report),
the MMSI number of the caller, a user definable name, the time
and date of the call, the Bearing and Distance from your current
position, and the coordinates of the caller. To see the callers
location on a map, select the Show Map button. To create a
waypoint at the caller’s location, select the Create Wpt button. To
close the Notification Page, press QUIT.
GPSMAP 198C Sounder Owner’s Manual
When a Distress Call or Position Report is placed in the Call List
and Log, the information on the Notification Page is retained.
To review a DSC call or log entry, highlight the entry and
press ENTER. The DSC Entry Review Page is identical to the
Notification Page with one exception, the entry can be deleted.
DSC Entry Review Page
To review a call or log entry:
1. Press Menu twice.
2. Open the Call List or Log from the DSC tab.
3. Press up or down on ROCKER to highlight the call you want
to review.
4. Press ENTER to open the DSC Entry Review Page.
23
BASIC OPERATION > DSC
DSC Call List
The DSC Call List shows the 50 most recent calls, even if the unit
is left unattended. The Call List shows the most recent call from a
vessel. If a second call from the same vessel is received, it replaces
the first call in the Call List. Press MENU to sort the list and delete
entries.
DSC Log
When DSC calls are received, they are automatically placed in the
Log, with the most recent call at the top. The unit can log up to 100
calls. When 100 calls are logged, the oldest log is removed when a
new call is received. Press MENU to sort the list and delete entries.
DSC Directory
The DSC Directory acts much like a phone book and can hold up
to 50 entries. Pressing MENU from this page shows options to add
a New Item, Delete a highlighted entry, or Delete All entries.
3. Enter the MMSI number, a Name, and any comments.
4. When finished, highlight OK, and press ENTER.
New Directory Item Page
When a Distress Call, Position Report, or Directory item is named,
the name is attached to that particular MMSI number. If a name is
used, all DSC entries of the same MMSI number show the name.
To add a new Directory entry:
1. Open the DSC Directory in the Main Menu.
2. Use the ROCKER to highlight the first blank space in the
directory list, and press ENTER.
Or
Press MENU, highlight New Item, and press ENTER.
24
GPSMAP 198C Sounder Owner’s Manual
BASIC OPERATION > DSC
Navigating to a Position Report or Distress Call
After a Position Report or a Distress Call is received, navigation
can be quickly set to the call location.
To navigate to Position Report or Distress Call:
1 Press NAV.
2. With Go To MMSI/Name highlighted, press ENTER.
Or
1. Highlight the call on the Call List or Log, and press NAV.
Setting up DSC
The DSC Setup tab turns DSC chartplotter information screen On
and Off. This Setup tab also allows you to simulate Distress Calls
and Position Reports while the unit is in Simulator Mode
(see page 3). Simulating calls is helpful for practice before
connecting to the real system. The Distress Call simulator also
helps to check if alarms are working properly.
2. With Go To MMSI/Name or DSC highlighted, press ENTER.
DSC Setup
Navigating to a DSC Call
GPSMAP 198C Sounder Owner’s Manual
25
MAIN PAGES > OVERVIEW
MAIN PAGES
There are five main pages that are always available: Map, Sonar, Compass, Numbers, Highway, and Active Route Pages. You can cycle
through these pages by pressing either PAGE or QUIT. For information on the Sonar Page, refer to the “Using Sonar” section on page 78.
With the Map Page shown, press PAGE several times. Each time you press PAGE the next main page appears. Do the same with the
QUIT key. QUIT acts the same as PAGE, except the pages are shown in a reverse sequence.
Each main page has an Options Menu. Options Menus contain the setup options and functions that apply to that page. Press MENU
to show the Options Menu. Use the ROCKER to select an item from the options menu and press ENTER. Many of the menus in the
GPSMAP 198C Sounder are arranged in a tab layout. Use the ROCKER to move left or right from tab to tab.
Notice that either PAGE or QUIT stops the current function and returns you to the main page. If you find yourself lost in a menu or you
start a function you do not want, press PAGE or QUIT.
Map Page
26
Sonar Page
Compass Page
Numbers Page
Highway Page
Active Route Page
GPSMAP 198C Sounder Owner’s Manual
MAIN PAGES > MAP PAGE
Map Page
The GPSMAP 198C Sounder’s Map Page provides a
comprehensive screen of electronic cartography, plotting, and
navigational data. When using the unit with optional BlueChart or
MapSource data, the Map Page shows your boat on a digital chart,
complete with geographic names, map items, navaids, and a host of
other chart features. It also plots your track and shows any routes
and waypoints you create. The map pointer allows you pan and
scroll to other map areas, determine the distance and bearing to a
location, and perform various route and waypoint functions.
When the map pointer is active, an additional data window appears
below the data fields to indicate the location, range, and bearing to
the pointer, a selected waypoint, or map item. The map zoom range
shown at the bottom right of the page.
The Zoom IN and OUT keys combined with the ROCKER,
allows you select zoom ranges and move the pointer. Two basic
map operating modes, Position Mode and Pointer Mode, determine
what cartography is shown on the Map Page. Position Mode moves
the cartography to keep the present position marker within the
screen area. Pan Mode moves the cartography to keep the map
pointer within the screen area.
GPSMAP 198C Sounder Owner’s Manual
Data Fields
Land
User Waypoint
Map Item
Position Triangle
Navaids
Water
Geographic
Name
Map Zoom Range
Map Page shown using
optional MapSource data.
The GPSMAP 198C Sounder system starts in the Position Mode,
with your location centered on the Map Page. When sufficient
map coverage is not available to keep your location centered, the
position triangle moves toward the edge of the screen.
Pan Mode starts when the ROCKER is pressed. The pointer is
moved over the Map Page using the ROCKER. When the pointer
reaches the edge of the screen, the map scrolls forward under the
pointer.
27
MAIN PAGES > MAP PAGE
Using the Map Pointer
The pointer pans away from your present location (even outside
of your current detail coverage.) As you pan past the edge of the
current Map Page, the screen actively scrolls forward to provide
continuous map coverage. An hourglass symbol appears by the
pointer while the unit is busy drawing new map details.
Additional
Information Tabs
Pressing ENTER while
highlighting a map item
brings up additional
details and options.
Additional Options
Move the pointer
over an item
on the map to
highlight it.
As you move the pointer, the distance and bearing from your
present location to the pointer is shown in the data window, along
with the pointer’s location coordinates. Keep in mind that when the
pointer is stationary, the distance and bearing from your present
position changes as your location moves. The pointer can also be
used to view on-screen waypoint and map item properties directly
from the Map Page.
28
To select an on-screen waypoint or map item with the
map pointer:
1. Use the ROCKER to move the map pointer to a waypoint or
map item. (If there are several waypoints grouped closely
together, zoom in closer for a better view.)
2. When a waypoint or map item is selected, it is highlighted
on-screen, with the name and location shown. Press
ENTER to show details of the map item. When using
BlueChart or MapSource data, additional information tabs
appear. Use the ROCKER to highlight the individual tabs,
and shows additional information and options.
3. Press QUIT to re-center your location on-screen.
GPSMAP 198C Sounder Owner’s Manual
MAIN PAGES > MAP PAGE
Use the pointer to create new waypoints directly from the map.
To create a waypoint with the pointer:
1. Use the ROCKER to move the pointer to the map location.
2. Press ENTER, and the New Map Waypoint window
appears. If the pointer is on a map item, press ENTER, and
a new window with details about the item appears.
3. Press ENTER again on the highlighted Create Wpt option.
4. Press ENTER to confirm the new waypoint using the default
three-digit name and symbol.
For more information about waypoints, see page 8.
Selecting Map Zoom Ranges
The Map Page has 28 available range scales from 20 ft to 800 mi
(5 m to 1200 km.) The map zoom range is controlled by the IN and
OUT keys, with the current zoom range shown at the bottom right
of the data window.
To select a map zoom range:
Press the OUT key to zoom out and the IN key to zoom in.
NOTE: The zoom range value represents the distance from one
end of the zoom range bar to the other.
Using Built-In Basemap
Using BlueChart or MapSource Data
Overzoom, no additional data is available
GPSMAP 198C Sounder Owner’s Manual
29
MAIN PAGES > MAP PAGE
The GPSMAP 198C Sounder’s system has a built-in worldwide
database to 20 mi, with more detailed coverage available through
the use of the optional BlueChart or MapSource data. The
GPSMAP 198C Sounder shows cartography as long as there is
chart information available for the range you have selected. Map
coverage conforms to the following conditions:
• When the selected zoom range is covered by the internal
database, BlueChart, or MapSource data, cartography is
shown.
• When the selected zoom range is covered by both
the internal database and BlueChart/MapSource data,
cartography is shown using the data with the best resolution.
• When the selected zoom range exceeds the resolution of the
data in use, an Overzoom warning appears below the zoom
range.
Map Page Options
Many features of the GPSMAP 198C Sounder are menu driven.
Each main page has an options menu, allowing you to customize
the corresponding page to your preferences and/or select special
features that specifically relate to that page. The data window,
located at the top of the main pages, provides a user-selectable
layout of various types of useful data. Each data field can be
configured to show any one of several data options. The data
window layout can be configured to show additional data fields and
change the size of the data shown.
The GPSMAP 198C Sounder’s Map Page provides access to
functions and features relating to the Map Page and layout options.
To show and select the Map Page options:
1. Press MENU.
2. Use the ROCKER to highlight an option, and press ENTER.
The available options are Full Screen Map/Show Data, Change
Numbers, Measure Distance, Show Sonar (If equipped with a
transducer, see the “Using Sonar” section on page 78 for details on
this feature,) Set up Map and Turn Declutter On/Off. Following are
details on using each of these options.
30
GPSMAP 198C Sounder Owner’s Manual
MAIN PAGES > MAP PAGE
Change Numbers—specifies the type of data shown in each data
field used on the Map Page.
To change a data field:
1. From the menu, use the ROCKER to highlight the Change
Numbers option, and press ENTER.
2. Move the field highlight to the data field you want to change,
and press ENTER.
3. Move up or down on the list using the ROCKER to highlight
the data you want to show, and press ENTER. To exit, press
QUIT.
Map Page Options
Full Screen Map/Show Data—toggles between the Map Page
without or with data fields on the Map Page.
To maximize the map/show data fields:
1. Highlight Full Screen Map, and press ENTER. The Map
Page is now maximized with no data fields.
2. To show the data fields again, press MENU, highlight Show
Data, and press ENTER.
NOTE: Pointer, Highway, Location, and Sonar field options
are only available on medium and large sized data fields.
GPSMAP 198C Sounder Owner’s Manual
31
MAIN PAGES > MAP PAGE
You can also merge the four medium default data fields to a single,
large field for better readability or you can split any or all of the
default data fields to show four small data fields.
3. Move the pointer to the end measurement point. The
bearing and distance from the reference point and pointer
coordinates is shown in the data window at the top of the
screen. Press QUIT to finish.
Pointer
Coordinates
Single, large data
field
Distance and
Bearing
Default, medium
fields
Map Pointer
Split, small
fields
Measure Distance—measures the bearing and distance between
any two points on the Map Page.
To measure the bearing/distance between two points:
Full screen map shown
(with BlueChart data)
1. Highlight Measure Distance, and press ENTER. An
on-screen pointer labeled ENT REF appears on the Map
Page at your present location.
2. Move the pointer to a reference point (the point that you
want to measure from), and press ENTER.
32
GPSMAP 198C Sounder Owner’s Manual
MAIN PAGES > COMPASS PAGE
Set up Map—configures the Map Page preferences, including map
detail, map orientation, automatic zoom, and various map items
and points. Refer to “Main Menu—Map Tab” on page 64 for more
information.
To change a map setup feature:
1. From the Map Page menu, highlight Set up Map, and press
ENTER.
2. Press left or right on the ROCKER to highlight a tab, then
press up or down on the ROCKER to highlight the setting
you want to change, and press ENTER.
3. Press up or down on the ROCKER to highlight to a setting,
and press ENTER. To exit, press QUIT.
From the map setup page, you can access the following menu
options by pressing MENU:
• Defaults—restores settings back to factory settings for the
tab highlighted.
• All Map Defaults—restores settings back to factory settings
for all tabs.
Turn Declutter On/Off—toggles between showing BlueChart spot
soundings and map outlines for easier viewing.
GPSMAP 198C Sounder Owner’s Manual
Compass Page
The Compass Page provides graphic steering guidance to a
destination waypoint, with an emphasis on the bearing to your
destination and current direction of travel. The middle of the
page features a rotating compass ring that shows your course
over ground (track) while you are moving, and a bearing pointer
that indicates the direction of the destination (bearing) relative
to the course over ground. The compass ring and pointer arrow
work independently to show—at a glance—the direction of your
movement and the direction to your destination. For instance, if
the arrow points up, you are going directly to the waypoint. If the
arrow points any direction other than up, turn toward the arrow
until it points up—then continue in that direction.
The current speed, distance to the next waypoint, turn angle and
current location appear at the top of the screen. This page provides
better steering guidance when traveling at slower speeds and/or
when making frequent directional changes. When you are not
navigating to a waypoint, the compass ring shows the current
direction of travel but the arrow does not appear.
NOTE: The bearing pointer, bearing bug, and compass ring
can point in various directions when you are stationary or at
very low speeds. Once you start moving, the pointer is correct.
33
MAIN PAGES > NUMBERS PAGE
Current
Go To
Destination
Data
Fields
Bearing
Bug
Bearing
Pointer
Compass
Ring
The GPSMAP 198C Sounder’s Compass Page features a menu that
provides access to layout and data field options. The data window,
located at the top of the page, provides a user-selectable layout
of various types of useful data. Each data field can be configured
to show several data options. The data window layout can be
configured to show additional data fields and change the size of the
data shown.
Numbers Page
The Numbers Page provides for precision navigation to 1 degree of
steerage. The default page shows three large numbers fields. You
can customize the Numbers Page to show the size and number of
fields along with the type data you want to see. See page 31 for
instructions on changing the data fields.
The Numbers Page provides a quick reference for the important
data you want to show. By default, the page shows three large,
user-selectable data fields showing a compass ribbon, speed, and
current location coordinates. You can also choose to show the three
data fields in large lettering for better readability or you can split
any or all of the data fields to show four smaller data fields. See
page 31 for detailed instructions on changing the data fields and
layout of the Numbers Page.
To show and select the Compass Page options:
1. Press MENU.
2. Use the ROCKER to highlight an option, and press ENTER.
For detailed instructions on changing the data fields and
layout of the Compass Page, see page 31.
34
GPSMAP 198C Sounder Owner’s Manual
MAIN PAGES > HIGHWAY PAGE
Highway Page
Numbers Page
shown with middle
data field split into
four fields
The GPSMAP 198C Sounder’s Highway Page provides graphic
steering guidance to a destination waypoint, placing greater
emphasis on the straight-line course, and the distance and direction
you are off course. As you head toward your destination, the
middle of the screen provides visual guidance to your waypoint
on a moving graphic highway. Your present location is at the
bottom center of the Highway Page. The line down the middle
of the highway represents your course. As you navigate toward a
waypoint, the highway moves—indicating the direction you are off
course. To stay on course, steer toward the center of the highway.
To split the data fields:
1. Press MENU, then press ENTER. Highlight the data field,
and press MENU.
2. Highlight Split Numbers, then press ENTER. Four new data
fields appear. Press QUIT to finish.
3. To return to the original configuration, repeat steps
1 and 2, but instead of Split Numbers, select either Merge
Numbers or Defaults. Press QUIT to finish.
GPSMAP 198C Sounder Owner’s Manual
Steer toward
the center of the
highway or towards
the black vertical
bar on the compass
ribbon to get back
on course.
35
MAIN PAGES > HIGHWAY PAGE
The four data fields at the top of the page provide additional userselectable guidance information. Additionally, a compass ribbon
shows your current heading along with a dark, vertical bar that
indicates the direct bearing to the navigation point. When the dark,
vertical indicator (or arrow) lines up with the lighter red bar in
the middle, you are heading directly to the navigation point. Use
the Highway Page as your primary navigation page in lieu of the
Compass Page when your main concern is following a defined
course.
Current
Waypoint
Data Fields
Course
Present
Location
36
You can zoom in or out on the Highway Page for a smaller or
larger view. Five available settings range from 1X to 16X, with
a default setting of 8X. The current zoom range appears in the
bottom right of the screen.
To zoom in or out on the Highway Page:
Press either the IN or OUT key to increase or decrease the
zoom range.
Highway Page Options
The GPSMAP 198C Sounder’s Highway options page defines the
data fields and selects the waypoints and tracks shown. The data
window, located at the top of the page, provides a user-selectable
layout of various types of data. Each data field can be configured
to show several data options. The data window layout can be
configured to show additional data fields and change the size of the
data shown.
To show and select the Highway Page options:
1. Press MENU.
2. Using the ROCKER, highlight an option, and press ENTER.
Zoom
Scale
GPSMAP 198C Sounder Owner’s Manual
MAIN PAGES > ACTIVE ROUTE PAGE
Active Route Page
Check or uncheck
the options you
want to show
or hide on the
Highway Page.
The Active Route Page shows each point of the active route, with
the point name, distance and choice of Course, ETA, Fuel, Leg
Distance, Leg Fuel, Leg Time, Sunrise, Sunset, or Time To for each
point from your present location. The current destination point is
marked with an arrow icon. As you navigate a route, the waypoint
list automatically updates to indicate the next active point first. The
Active Route and Route Review Pages share many of the same
features and options. For more information on the Active Route
Page, see page 17.
Preview Window
Highway Page Set up
NOTE: The Active Route Page only appears when the unit is
navigating to a destination using a route, TracBack, or Go To.
The following options are available from the Highway Page menu:
Set up Highway—selects what waypoints and tracks are shown on
the Highway Page. Use the ROCKER and ENTER keys to select
or deselect the options.
Change Numbers—specifies the type of data shown in each data
field used. For detailed instructions on changing the data fields and
layout of the Highway Page, see page 31.
Active Route Page
GPSMAP 198C Sounder Owner’s Manual
37
MAIN PAGES > ACTIVE ROUTE PAGE
Active Route Page Options
The following options are available from the Active Route Page:
• Hide/Show Numbers—see page 31 for instructions (same
as Map Page option).
• Change Numbers—see page 31 for instructions.
• Edit on Map—see page 17 for instructions.
• Add Before—see page 17 for instructions.
• Remove—see page 17 for instructions.
• Invert—reverses the direction of the route.
• Re-evaluate—recalculates and restarts the current route.
• Invert—reverses the route.
Re-evaluate—restarts the current route and selects the route leg
closest to your current location as the active leg. The active leg
defines the current from and to waypoints.
To re-evaluate an active route:
1. From the Active Route Page, press MENU.
2. Using the ROCKER, highlight Re-evaluate and press
ENTER to recalculate.
To invert an active route:
1. From the Active Route Page, press MENU.
2. Using the ROCKER, highlight Invert, and press ENTER to
reverse the route.
38
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > GPS TAB
MAIN MENU
The GPSMAP 198C Sounder’s Main Menu provides access to
various waypoint, system, navigation, interface management,
and setup menus. The 19 Menu tabs are divided into categories
by function. The Main Menu is available from any page in the
system, and is accessed by pressing MENU twice. See page 6 for
additional instructions on changing settings and entering data.
Sub Tabs
To select a Menu tab from the Main Menu Page:
1. Press up or down on the ROCKER to highlight a tab. The
information for the highlighted tab automatically appears
to the right. If you want to select any of the sub tab items,
press right on the ROCKER, then press up or down to
select individual items.
2. Either press MENU for additional submenu options, or press
ENTER to make changes to the highlighted item. Press left
on the ROCKER to get back to the Main Menu.
3. Press QUIT to return to the Main Menu.
GPS Tab
The GPS tab provides a visual reference of satellite acquisition,
receiver status, and accuracy. The status information provides
an idea of what the receiver is doing at any given moment. The
sky view and signal strength bars give you an indication of what
satellites are visible to the receiver and whether or not they are
being tracked. The signal strength is shown on a bar graph for each
satellite, with the satellite number below. As the receiver locks onto
satellites, a signal strength bar appears for each satellite in view.
The progress of satellite acquisition is shown in three stages:
Main Menu
Tabs
Main Menu
GPSMAP 198C Sounder Owner’s Manual
39
MAIN MENU > GPS TAB
• No signal strength bars—the receiver is looking for the
satellites indicated.
• Light signal strength bars—the receiver has found the
satellite(s) and is collecting data.
• Dark signal strength bars—the receiver has collected the
necessary data and the satellite(s) are ready for use.
Accuracy
Sky View
Receiver Status
DOP
Differential
Status
Signal Strength
Bars
The status field indicates a 2D or 3D, when the GPSMAP 198C
Sounder has collected the necessary data from satellites to calculate
a fix. The unit then updates the location, date, and time.
40
You can use the sky view to help determine if any satellites
are being blocked, and whether you have a current location fix
(indicated by a 2D, 2D Differential, 3D, or 3D Differential in
the status field). The sky view shows a bird’s-eye view of the
position of each satellite relative to the receiver’s last known
location. The outer circle represents the horizon (north up), the
inner circle 45º above the horizon, and the center point a position
directly overhead. You can also set the sky view to a Track up
configuration, causing the top of the sky view to align along your
current track heading.
WAAS Capability
The GPSMAP 198C Sounder is capable of receiving WAAS (Wide
Area Augmentation System) satellite signals. WAAS is an FAA
(Federal Aviation Administration) funded project to improve the
overall accuracy and integrity of the GPS signal for aviation use,
but land/sea based users can also benefit from this system. At this
time, the system is still in the development stage and is not fully
operational.
There are currently two WAAS satellites that can be received in the
U.S.A., one over the Atlantic Ocean and one over the Pacific
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > GPS TAB
Ocean, in a geo-stationary orbit over the equator. Effective use
of the WAAS satellite signal can be limited by your geographic
location in relation to those satellites, now in developmental
service. WAAS satellite signal reception requires an absolute
clear view of the sky and works best when there are no nearby
obstructions such as buildings, mountains.
WAAS satellites are numbered 33 or higher when viewing the
sky view on your GPSMAP 198C Sounder. Initial reception of
the WAAS signal can take up to 15-20 minutes, then 1-2 minutes
afterwards. When WAAS differential correction has been received
for GPS satellites (numbers 32 or below), a D appears in the
signal bar of the sky view and 2D or 3D Differential appears in the
receiver status. To learn more about the WAAS system, its satellite
positions and current state of development, visit the FAA web site
(http://gps.faa.gov). Since WAAS requires CPU resources of the
GPSMAP 198C Sounder to search for and track the satellites,
you can disable the WAAS feature to improve unit performance
if WAAS reception is not available in your area. Refer to the
“Appendix” for more information.
GPSMAP 198C Sounder Owner’s Manual
To Disable/Enable WAAS capability:
1. From the GPS tab, press MENU.
2. Use the ROCKER to highlight WAAS Off or WAAS On, and
press ENTER.
Highlight WAAS Off, and press ENTER
to disable the WAAS capabilities.
41
MAIN MENU > GPS TAB
• AutoLocate—the receiver is looking for any satellite whose
almanac has been collected. This process can take up to five
minutes.
• Acquiring Satellites—the receiver is looking for and
collecting data from satellites visible at its last known or
initialized position, but has not collected enough data to
calculate a fix.
• 2D—at least three satellites with good geometry have been
acquired and a 2 dimensional position fix (latitude and
longitude) is being calculated. “2D Differential” appears
when you are receiving DGPS corrections in 2D mode and a
D shows on the strength bar of satellites being corrected.
• 3D—at least four satellites with good geometry have been
acquired and your location is now being calculated in
latitude, longitude and elevation. “3D Differential” appears
when you are receiving DGPS corrections in 3D mode and a
D shows on the strength bar of satellites being corrected.
• Poor GPS Coverage—the receiver is no longer tracking
enough satellites for a 2D or 3D fix.
• Receiver Not Usable—the receiver is unusable, possibly
due to interference or abnormal satellite conditions. Turn the
unit off and back on to reset.
• Simulating—the receiver is in Simulator Mode.
42
The Differential Receiver status shows one of the following:
• Off—No optional beacon receiver attached or enabled in the
Comm menu or WAAS Off.
• Searching For WAAS—WAAS is enabled and receiver is
searching for WAAS signal
• Using WAAS—WAAS capability enabled and unit receiving
WAAS corrections.
• No Beacon Signal—DGPS receiver attached, but not
transmitting RTCM data to GPS.
• Tuning Beacon—receiver is tuning manual DGPS
frequency.
• Receiving Beacon—unit is receiving DGPS corrections.
• Scanning Beacon—DGPS receiver is scanning for available
frequency.
The Differential SNR (Signal to Noise Ratio) indicates, on a scale
to 0-30db with 30db being the best, the strength of the DGPS signal
being received. The SNR depends on the mounting of your DGPS
receiver and the distance from the DGPS transmitting station. If no
optional DGPS receiver is used with the GPSMAP 198C Sounder,
the DGPS Rcvr field shows Off.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > TIDE TAB
GPS Tab Options
The GPS tab features an options page that provides access to
functions and features relating to the GPS Info Page.
To show and select the GPS Tab options:
Tide Tab
The Tide tab shows a graphical chart that shows tide station
information in a 24 hour span starting at midnight station time. You
can choose from different dates and more than 3,000 tide stations.
1. Press MENU.
2. Using the ROCKER, highlight an option, and press ENTER.
Station
Name
NOTE: If a DGPS receiver is attached to the unit and Garmin
DGPS, RTCM In/NMEA Out, or Other DGPS is enabled on
Port 2, WAAS is automatically disabled (WAAS Off). It is not
possible for the GPSMAP 198C Sounder to receive WAAS and
DGPS corrections at the same time.
Date
Tide
Chart
Event
Times
Tide Tab
GPS Tab Options
GPSMAP 198C Sounder Owner’s Manual
The top of the page shows the tide station being referenced, below
that the date. The top of the chart shows a 24-hour block of local
time (LCL) for your location, with the reported station time (STA)
appearing at the bottom. Daytime (light bar) and nighttime (dark
bar) show across the time scale, with the time progressing from
left to right. (Local time scales and sunrise/sunset info can not
be available for a few stations). The solid, light vertical lines are
43
MAIN MENU > TIDE TAB
in 4-hour increments, and the light, dotted vertical lines are in
1-hour increments. A solid, vertical line (with the current time box
at the top) indicates the time of day when using current date and
intersects the tide graph to show their relation.
You can select from
a list of nearest
stations.
The tide curve shows as a shaded area, with higher tides being
taller (blue) and lower tides shorter (red). The solid, horizontal
line (with the current tide box on the left) indicates the current tide
height. The figure to the left of the line shows the current tide level
in feet. The Mean Lower Low Water (MLLW) appears as a solid,
horizontal line near the bottom of the chart (This line only appears
if the tide ranges to the zero value or below). The numbers directly
below/above LCL and STA indicate the maximum/minimum levels,
respectively. The four data fields below the chart, indicate event
times and levels the tide changes starting in the upper left field,
going downward, then to the upper right and down again.
To select the nearest tide station from you current
location:
Local Time
Day
Max. Level
Current Time Bar
High Tide
Curve
Current Tide
Height Bar
Low Tide
Curve
Min. Level
1. From the Tide tab, highlight the At field, and press ENTER.
2. Highlight the station of the list, and press ENTER twice.
MLLW
Night
Station Time
44
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > TIDE TAB
Automatically search for the nearest station using a variety of
search locations. You must select a location within 100 nm of a
tide station. If you are not within this range, you see a message
“None Found.” Use the Nearest To Other Find option and select a
location closer to a tide station.
To select a tide station from the map:
1. When the search results appear, press FIND, highlight Tide
Stations, press ENTER, and then press MENU.
2. Highlight Nearest To Other, and press ENTER.
3. Select a location on the map, and press ENTER. A list
appears showing the nearest tide stations.
4. Highlight the station, and press ENTER twice. If the None
Found message appears, repeat steps 1-4 until you find a
station.
To change the date for the tide chart:
1. Using the ROCKER, highlight the On field, and press
ENTER.
2. Enter the date, and press ENTER.
To use the current date:
Press MENU, highlight Use Today’s Date, and press
ENTER.
GPSMAP 198C Sounder Owner’s Manual
45
MAIN MENU > TRIP TAB
Move the time bar on the tide chart in 5 minute increments to show
tide heights at various times on the chart.
To see tide heights at various times on the chart:
1. Press MENU, highlight Move Cursor, and press ENTER.
2. Press left or right on the ROCKER to change the time.
Press QUIT when finished or press MENU, highlight Stop
Moving Cursor, and press ENTER.
Trip Tab
The Trip tab shows the Trip Odometer, Moving Average speed,
Total Average speed, Maximum Speed, Stopped Time, Moving
Time, Total Time, and Odometer. To reset the data, choose from
Reset Trip, Reset Max Speed, Reset Odometer, or Reset All, and
pressing ENTER.
Move the pointer to
see tide heights at
different times. Tide
data shows in a black
box when in pointer
mode.
46
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > CELES TAB
Celes (Celestial) Tab
To choose a position:
The Celestial tab shows celestial data for sun and moon rise/set,
moon phase, and approximate sky view location of the sun and
moon. The moon phase shows the current visible portion of the
moon as a light color. You can show this data for your current
location, a location from the map, or a Find item location. Use the
current data, or select a different date and time.
Position
Date/Time
Sun/Moon
Event Times
Sky view
Window
Moon Phase
Sun Position
Overhead (90°)
1. From the Celes tab, highlight the At field, and press
ENTER.
2. From the Find list highlight any category, except Other
Location, and press ENTER. If you want to reference a Find
item, select from the Find list, and press ENTER.
3. Select an item from the list or tab lists, and press ENTER.
For a location from the map, choose Other Location, press
ENTER, select a location on the map, and press ENTER.
4. From the Find item detail page, highlight OK, and press
ENTER.
The location the unit is using appears in the Date/Time/Position
field. The time tables shown are based on your current time zone.
When using a position from another location outside of your time
zone, you need to set the Time Zone for that location. See page 62
for more information on setting time zones.
Moon
Position
70° 45°
GPSMAP 198C Sounder Owner’s Manual
Horizon (0°)
47
MAIN MENU > POINTS TAB
Points Tab
The Main Menu Points tab features two waypoint sub tabs, User
and Proximity, that manage a large number of waypoints quickly
and efficiently. The sub tabs also provide a continuously updated
proximity waypoint alarm function that can be used to define an
alarm circle around items such as submerged hazards or shallow
waters.
Sub Tabs
Celestial Tab Menu
To change the time or date:
1. From the Celes tab, use the ROCKER to highlight the date
or time, and press ENTER.
2. Enter a new date or time, and press ENTER.
Main Menu
Tabs
To use current date and time:
From the Celes tab, press MENU, use the ROCKER to
highlight Use Current Date and Time, and press ENTER.
48
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > POINTS TAB
To select the Points (Waypoint) sub tab:
1. Use the ROCKER to highlight the Points menu tab. A list of
stored waypoints appear to the right of the Main Menu list.
2. Press right one time on the ROCKER. The User tab is now
highlighted.
3. Press down on the ROCKER until a waypoint is highlighted.
User Waypoint List
The first waypoint submenu list available from the Points tab is
the User list, which shows a master list of all waypoints currently
stored in memory. From the User list, you can review, edit, rename
or delete individual waypoints, or delete all user waypoints. The
total number of stored and available waypoints is shown at the
bottom of the User page, with the stored waypoints arranged in
alphanumerical order.
GPSMAP 198C Sounder Owner’s Manual
The following options are available from the User submenu on the
Points tab:
• Create Waypoint—allows you to create a waypoint. (See
page 8 for creating a waypoint)
• Delete Waypoint—deletes selected waypoint from and
waypoint list and route.
• Delete By Symbol—deletes waypoints that use the same
symbol.
• Delete All—deletes all waypoints from the unit.
NOTE: When a waypoint is deleted from the list, it cannot be
recovered from the unit. It is advisable to backup important
waypoints to a computer using an optional PC cable and
interface software or record them manually.
49
MAIN MENU > POINTS TAB
To show the waypoint menu options:
Using the ROCKER, highlight the User tab, and press
MENU.
To scroll through and review the waypoint list:
1. With the ROCKER, highlight the Points tab from the
Main Menu, and then highlight User.
2. Use the ROCKER to scroll through the list.
3. Press ENTER to review the highlighted waypoint on the
Waypoint Edit Page.
4. Press ENTER to return to the list and automatically highlight
the next waypoint.
To delete an individual waypoint from the list:
1. Use the ROCKER to highlight the waypoint to delete, and
press MENU.
2. Highlight Delete Waypoint, and press ENTER. You can
also highlight the waypoint, press ENTER, then highlight
Delete, and press ENTER.
3. Press ENTER to confirm the deletion warning.
To search for a waypoint by name:
1. Highlight the name field, and press ENTER.
2. Use the ROCKER to select the first letter of the name.
3. Move to the right, and enter the second letter, if you do not
see the name in the list below.
4. Repeat this until the name appears. Press ENTER when
you see the name.
5. Highlight the name on the list, and press ENTER again
to review the waypoint. When finished, highlight OK, and
press ENTER.
50
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > POINTS TAB
To delete waypoints by symbol:
1. From the User sub tab, highlight the waypoint to delete, and
press MENU. Select Delete By Symbol, and press ENTER.
2. Use the ROCKER to highlight the symbol of the waypoint(s)
to delete, and press ENTER.
3. Press ENTER to confirm. To stop the deletion, choose
Cancel, or press QUIT.
To delete all waypoints or the entire waypoint list:
1. Press MENU to select the options window.
2. Use the ROCKER to highlight Delete All, and press
ENTER.
3. Highlight OK, and press ENTER to confirm.
GPSMAP 198C Sounder Owner’s Manual
Proximity Waypoint List
The Proximity list allows you to define an alarm circle around a
stored waypoint location, and can be used to help you avoid reefs,
rocks, or restricted waters. Up to 10 waypoints can be listed, with
a maximum alarm radius of 99.99 nautical or statute miles or
kilometers. If a proximity alarm circle overlaps with an existing
alarm circle, a “Proximity Overlaps Another Proximity Waypoint”
message appears. Because the unit only alerts for one of the
overlap points, use caution when navigating in these areas. If you
enter an alarm circle overlap, you are only alerted to the closest
proximity waypoint.
51
MAIN MENU > POINTS TAB
To add a proximity waypoint:
1. Use the ROCKER to highlight an empty space on the
Proximity list, and press ENTER. The Find screen appears.
Highlight Waypoints, and press ENTER.
2. To select a waypoint from the lists, use the ROCKER to
highlight a waypoint from the User or Nearest tab.
To select a waypoint from the map, highlight either the User
or Nearest tab, and press MENU. With Select From Map
highlighted, press ENTER. Use the zoom In and Out keys
and the ROCKER to highlight a waypoint.
3. Press ENTER to confirm. The distance field is now
highlighted.
4. Press ENTER to begin entry of the proximity radius.
5. Use the ROCKER to enter a distance value (to 99.99 units),
and press ENTER.
Proximity Waypoint
Proximity Circle
A dashed circle
appears showing
the alert boundary
for the proximity
waypoints.
52
To turn on or off proximity alarms:
1. Use the ROCKER to highlight the field below Proximity
Alarm, and press ENTER.
2. Select a ON or OFF setting, and press ENTER.
To show the waypoint menu options:
Using the ROCKER, highlight the Proximity tab, and press
MENU.
To clear one or all proximity waypoint(s) from the list:
1. Use the ROCKER to highlight the proximity waypoint, and
press MENU.
2. To clear a single alarm, highlight Delete Alarm, and press
ENTER.
3. To clear all proximity waypoints, select the Delete All
option, and press ENTER.
4. Use the ROCKER to highlight OK, and press ENTER.
The following options are available from the Proximity sub tab of
the Points tab:
• Delete Alarm—removes a selected waypoint from proximity
list.
• Delete All—removes all waypoints from proximity list.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > ROUTES TAB
Routes Tab
The GPSMAP 198C Sounder Route List Page shows all the routes
currently stored in memory, along with a descriptive name for each
route. After a route has been created, it can be started and used
for navigation with the NAV key. A route can be followed in the
same sequence as it was originally created, or you can invert the
route and navigate from the end waypoint back to the beginning
waypoint. From the Route list menu, you can choose New Route
(page 17), Copy Route, Delete Route, or Delete All.
To start a route with the NAV key:
1. From any page, press NAV, using the ROCKER, highlight
Follow Route, and press ENTER. If you highlight a route
from the Route List or Route Review Page, and press
NAV. The window automatically shows, Follow <the route
name>.
2. Highlight the route you want to navigate, and press ENTER.
3. Choose Activate or Invert and Activate, and press
ENTER. Activate uses the route as is. Invert and Activate
reverses and starts the route.
If you highlight a route
name from the Route
List and press NAV,
the name automatically
appears.
To stop navigation of a route:
Press NAV, highlight Stop Navigation, and press ENTER.
To copy or delete a route:
1. From the Route List, highlight the route you want to copy or
delete using the ROCKER, and press MENU.
2. Choose either Copy Route or Delete Route and press
ENTER. With OK highlighted, press ENTER again to
confirm a deletion. Copy uses the same route name with
an additional number, starting at 1, at the end of the route
name.
To delete all routes:
1. From the Route List, press MENU.
2. Highlight Delete All, and press ENTER. With OK
highlighted, press ENTER again to confirm the deletion.
GPSMAP 198C Sounder Owner’s Manual
53
MAIN MENU > ROUTES TAB
Route Review Page
After you create a route, the Route Review Page allows you to
review and modify the route shown.
Route Name
Data Fields
To show the Route Review Page:
1. Press MENU twice, highlight the Route tab.
2. Highlight the route you want to review, and press ENTER.
Route Points
Data Totals
The Route Review Page also allows you to enter your own 15character name for any listed route. By default, the name includes
the first and last waypoints in the route.
To enter a custom route name:
Route List Menu
54
1. From the Route Review Page, highlight the name field, and
press ENTER to begin editing.
2. Use the ROCKER to enter a name. Press ENTER when
finished.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > ROUTES TAB
When you are on the Route Review Page, you can review the route
points (waypoints or map items) one at a time from the list.
To review individual route points:
Route Review Menu Options
Menu options available from the Route Review Page are Edit on
Map, Add Before, Remove, and Trip Planning.
1. Highlight a point, and press ENTER.
2. On the waypoint review window, you can choose Next
(highlight the next point on the route list), Show Map (show
the point on a map window), or Delete (permanently delete
the waypoint from the unit), and press ENTER.
When you are back on the route point list, the next point in the
route is automatically highlighted. This allows you to review each
point on the route by pressing ENTER repeatedly.
Highlight a point, and press ENTER to review it.
Route Review Options Menu
GPSMAP 198C Sounder Owner’s Manual
55
MAIN MENU > ROUTES TAB
Edit on Map—allows you to review and modify the route shown
for each point (waypoint or map item) on a map page. Use the
pointer to insert a new route point on a route leg, review the
waypoint, or map item.
To edit the route on the map:
From the Route Review Page, press MENU, highlight
Edit on Map, and press ENTER.
To edit a route point:
Use the ROCKER to highlight a route waypoint, and press
MENU.
To review a route point:
Highlight the point, and press ENTER. Press ENTER again
when finished.
A menu of editing choices appear, with options for removing,
moving (user waypoints only), or adding turns to the beginning or
end of the route.
To remove a route waypoint:
Highlight the Remove option, and press ENTER.
To move a route waypoint:
1. Highlight the Move option, and press ENTER.
2. Move the pointer to the new map location, and press
ENTER.
56
To add turns at the beginning or end of the route:
1. Select the first (to add waypoints to the beginning of the
route) or last (to add waypoints to the end of the route)
route waypoint with the map pointer, and press MENU.
2. Highlight the Add option, and press ENTER.
3. Move the pointer to the new point or location, and press
ENTER.
4. If you are not inserting an existing waypoint, press ENTER
to confirm the new waypoint.
5. Repeat steps 3 and 4 to insert additional waypoints, or
press QUIT to finish.
The GPSMAP 198C Sounder’s route edit mode also allows you to
insert a new route waypoint in any route leg using the map pointer.
To insert a new waypoint between two existing route
waypoints:
1. Use the ROCKER to select the leg you want to insert the
new waypoint in (the route line is now highlighted and a
dotted line appears when the leg is selected), and press
ENTER.
2. Move the pointer to the new map location, existing
waypoint, or map item (ADD is shown below the arrow and
the route lines move with the arrow), and press ENTER.
3. If you are not inserting an existing point, press ENTER to
confirm the new waypoint.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > ROUTES TAB
Add Before—inserts a waypoint into the list of route points or add
a point(s) onto the end of the route.
To insert a point into the route, or add a point to
the end:
1. From either the Route Review or Active Route Pages, use
the ROCKER to highlight the point you want to insert the
new point before (to add a point to the end, highlight the
blank field at the bottom of the list), and press MENU.
2. Highlight Add Before, and press ENTER.
3. From the Find menu, highlight Waypoints, and press
ENTER. (You can also choose from other points, such as
Cities or Tide Stations from this list.) From either the User
or Nearest From Current Location tab lists, choose the
waypoint you want and press ENTER twice. (See page 50
for searching for waypoints by name.)
Or
To select a waypoint from the map, highlight the User or
Nearest tab and press MENU. With Select From Map
highlighted, press ENTER. Use the zoom IN and OUT keys,
and the ROCKER to highlight a waypoint on the map, and
press ENTER.
GPSMAP 198C Sounder Owner’s Manual
Drag the route
leg to an existing
waypoint (shown),
map item, or a
blank spot on the
map to create a
new route point.
Remove—removes a point (waypoint or map item) from a route.
This option is available from both the Route Review and Active
Route Pages.
To remove a point from a route:
1. From either the Route Review or Active Route Pages, use
the ROCKER to highlight the point to remove, and press
MENU.
2. Highlight Remove, and press ENTER.
57
MAIN MENU > ROUTES TAB
Trip Planning—the Route Review and Active Route Pages also
show trip-planning information for each leg or the entire route.
Available information includes Course, ETA, Fuel (to point),
Leg Distance, Leg Fuel, Leg Time, Sunrise and Sunset (at point
location), and Time To (point).
Trip
Planning
Data Fields
To use the Trip Planning feature:
1. To select a planning field, highlight a route from the Route
List, and press ENTER to show the Route Review Page.
2. One of nine available planning fields appears to the right of
each route waypoint and its distance. Press left or right on
the ROCKER to select an item.
3. To enter planning information, from the Route Review
Page only, press MENU, and select Trip Planning from
the options list. Enter the figures for Speed, Fuel Flow,
Departure Time, and Departure Date. Press QUIT to return
to the Route Plan Page.
NOTE: Fuel flow rates on your unit are measured in units
per hour. System setting changes for units of measure (statute,
nautical or metric) do not affect the fuel flow measure. You
should enter fuel flow rates based on available information
for your vehicle’s (operator’s manual, or performance
specifications.) Make note of the units of measure
(gallons or liters.)
Delete Route—deletes a route from the Route List. Waypoints and
map items are not deleted from unit memory.
To delete a route:
1. From the Route Review Page, press MENU.
2. Highlight Delete Route, press ENTER, and press ENTER
again to confirm the deletion.
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GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > TRACK TAB
Track Tab
The Track tab specifies whether or not to record a track log, define
how it is recorded, or save track log data for future use. The Track
Logs Page also provides an indicator of the memory used for the
active track log and options to clear the track memory or start a
TracBack route. See pages 14 for TracBack information. The Track
tab is divided in two sub tabs: Active and Saved.
Active Sub Tab
Saved Sub Tab
The Saved sub tab shows and manages a list of any saved track
logs, allows for TracBack activation, and Map Page of saved logs.
The active log stores up to approximately 2,500 track log points,
based on the criteria specified in the Track settings. Up to 15 track
logs can be saved in memory, with up to 500 track log points in
each saved log. A TracBack can be started from any of the saved
tracks on this tab.
The Active sub tab is for the active log (the log currently being
recorded). It shows track memory used and current settings.
Saved Track Tab
Active Track Tab
GPSMAP 198C Sounder Owner’s Manual
59
MAIN MENU > TRACK TAB
For the Active tab, the following settings are available:
Record Mode—contains three track recording options:
• Off—the track log is not recorded. Selecting the Off setting
prevents you from using the TracBack feature.
• Fill—a track log is recorded until the track memory is full.
• Wrap—records the track log is continuously recorded,
wrapping through the available memory (replacing the oldest
track data with new data).
Interval—defines the frequency the track plots are recorded.
Three interval settings are available:
• Distance—records track based on a user-defined distance
between points.
• Time—records track plot based on a user-defined time
interval.
• Resolution—records track plot based on a user-defined
variance from your course over ground. The resolution
option is the default setting and is recommended for the most
efficient use of memory and TracBack performance. The
distance value (entered in the value field) is the maximum
error allowed from the true course before recording a track
point.
60
Value—defines the distance or time used to record the track
log.
Save—saves the current active track log.
Erase—clears the active track log stored in memory.
For the Saved tab, the following menu options are available:
Review On Map—shows the saved track log on a Track
Map Page.
Delete Track—deletes highlighted saved track log from
memory.
Delete All—deletes all saved track logs from memory.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > DSC TAB
You can use the Review On Map option to show a saved track on a
Track Map Page.
To start a TracBack from the Saved tab list:
1. Using the ROCKER, highlight a track, and press NAV.
2. The Follow <track name> automatically appears
highlighted. Press ENTER.
3. Choose either Original, which navigates you from the end
to the start of your trip, or Reverse, which navigates you
from the start to the end of your trip, and press ENTER.
DSC Tab
Digital Selective Calling (DSC) uses marine VHF radio and Global
Positioning System (GPS) technologies to transmit and receive
location information. DSC is used by mariners to assist them in two
major areas: Distress Calls and Position Reporting. See page 22
and the “Appendix” for more information on DSC and using it with
your GPSMAP 198C Sounder.
The track name
automatically
appears when
highlighted on the
Saved list and
NAV is pressed.
GPSMAP 198C Sounder Owner’s Manual
61
MAIN MENU > CARD AND TIME TABS
Card Tab
The Card tab contains options for saving waypoints, routes and
tracks to a data card. When data is saved to a data card, it can be
exchanged with other compatible units and Garmin’s MapSource
PC program.
To transfer data to/from a data card:
1. Insert the data card. From the Card tab, select the check
box next to each type of item you want to transfer.
2. Highlight Save To Card, and press ENTER to save the
selected items to the data card.
3. If transferring data from the card to the unit, highlight Merge
From Card, and press ENTER to combine the selected
items with those of your GPS. Highlight Replace From
Card, and press ENTER to overwrite all selected items on
your GPS.
4. A Transfer Complete message appears after the data is
transferred. Press QUIT.
62
Time Tab
The Time tab shows the current time and date, allows you to adjust
the 12 or 24 hour time format, enter a time zone, and adjust for
daylight saving time.
The following options are available:
• Time Format—choose from 12 or 24 hour (military) time
format.
• Time Zone—choose your correct time zone to show correct
local time or enter a UTC Offset. The UTC (also called
Greenwich Time) offset is how many hours you are ahead or
behind the time line.
• Daylight Savings Time—choose from Auto, On, or Off to
adjust for daylight saving time.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > PAGES TAB
Pages Tab
The Pages tab allows you to turn on/off any of the main pages or
Jump To a particular page. You can also set the page that appears
first when you turn on the unit or enable/disable the GPS Info on
the initial screen.
To select or deselect a main page:
Use the ROCKER to highlight the box to the left of the page
name. Pressing ENTER selects or deselects that page.
When a page is selected, a check mark appears in the box.
You must leave at least one page checked.
You can also press MENU, choose from one of the following, and
press ENTER:
• All Pages—selects all pages.
• Chartplotter Only—selects the Map Page only.
• Nav Tools Only—selects the Compass, Numbers, Highway,
and Active Route Pages only.
• Basic Fishfinder—selects the Sonar Page only if equipped
with a transducer.
• Defaults—selects all pages.
To set the first page:
Use the ROCKER to highlight the First page option, and
press ENTER. Highlight the page you want to appear first,
and press ENTER.
First Page
Option
Pages Tab
GPSMAP 198C Sounder Owner’s Manual
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MAIN MENU > MAP TAB
Map Tab
The Map tab changes the show properties of the Map Page.
The following pages contain descriptions of the Map tab’s eight
sub tabs.
General Sub Tab
• Detail—Most, More, Normal, Less, Least: controls how
much map detail is shown. This setting only applies to map
features set to Auto. Features that have a specified zoom
range or are turned off are unaffected by this setting.
• Orientation—North up: fixes the top of the Map Page to
a north heading. Track up: fixes the top of the Map Page to
the current track heading. Course up: fixes the map so the
direction of navigation is always up.
64
• AutoZoom—On, Off: when On the map automatically
adjusts the map zoom range to a lower range as you
approach you destination point.
• Color Mode—For Sun, For Dark: controls colors change to
correct for day and night lighting conditions.
Source Sub Tab
• Basemap—On/Off: turns the built-in base map on or off.
• Data Card Maps—On/Off: turns all optional BlueChart/
MapSource data loaded on the data card on or off. The
Data Card Maps option box shows a list of the optional
BlueChart/MapSource data loaded on the data card. Each
area is described by name and can be deselected if you do
not want to show the data on the Map Page.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > MAP TAB
To show the Map Information Page:
1. Highlight the Data Card Maps option box, and press
ENTER.
2. Use the ROCKER to scroll through the list of maps.
3. To select or deselect a map, highlight the check box to
the left of the name of a map. Press ENTER to select or
deselect the map. The map is selected and appears on the
Map Page when a check mark appears in the box adjacent
to that map.
4. To show detailed information and notes for each area,
highlight a name, and press ENTER. To view the notes for
that area, choose Show Notes. To scroll through the notes,
highlight the notes, press ENTER, and use the ROCKER to
scroll up, down, left, and right, or press MENU and choose
a scroll option.
GPSMAP 198C Sounder Owner’s Manual
Waypoints Sub Tab
The Waypoints and Active Route options each contain adjustments
for Text and Zoom.
• Text—None, Small, Medium, and Large: controls the screen
size of the name.
• Zoom—Auto, Off, 120 ft-800 mi: sets the maximum zoom
range features should appear on the Map Page. Some types
of data only show up at specific zoom ranges.
65
MAIN MENU > MAP TAB
Points Sub Tab
The Spot Soundings, Tide Stations, and Services options each
contain adjustments for Text and Zoom.
• Text—None (except Spot Snd.), Small, Medium, and Large:
controls the screen size of the name.
• Zoom—Auto, Off, 120 ft-800 mi: sets the maximum zoom
range features should appear on the Map Page. Some types
of data only show up to specific zoom ranges.
66
Navaids Sub Tab
• Symbol Set—Auto, Garmin, NOAA, International: controls
a navaid symbol set.
• Text Size—Small, Medium, and Large: controls the screen
size of the name.
• Light Sectors—Off, Auto, On: controls the drawing light
sectors on the map.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > MAP TAB
Nav Line Sub Tab
• Heading Line—On/Off: draws an extension from the end of
the boat icon in the direction of travel.
• Bearing Line—On/Off: toggles the black/white line that
points to the current navigation point.
• Course Line—Auto, Off, 120 ft-800 mi: sets the maximum
zoom range the course line appears on the screen.
Track Sub Tab
Other Sub Tab
• Accuracy Circle—On/Off: toggles the circle On and Off.
The circle represents the approximate accuracy of the unit
based on EPE, DOP, and basemap quality. Your location is
within the circle.
• Lat/Lon Grid—Text—None, Small, Medium, and Large:
controls the screen size of the name. Zoom—Auto, Off, 120
ft-800 mi: sets the maximum zoom range the feature should
appear.
• Map Outlines—On/Off: toggles the coverage boxes for
BlueChart/MapSource data On and Off.
The Saved Tracks and Track Log options each contain adjustments
for Zoom.
• Zoom—Auto, Off, 120 ft-800 mi: sets the maximum zoom
range the feature should appear on the Map Page. Some
types of data only show up to specific zoom ranges.
GPSMAP 198C Sounder Owner’s Manual
67
MAIN MENU > HIWAY, TEMP, AND SONAR TABS
Hiway (Highway) Tab
The Hiway tab contains screen settings for the Highway Page.
Refer to the “Highway Page” section on page 35.
Temp (Temperature) Tab
Sonar Tab
The Sonar tab contains setup options for the Sonar Page. The Sonar
Page is not active if you do not have a transducer connected. Refer
to the “Using Sonar” section on page 78 for more information on
sonar setup options.
The Temp tab screen the water temperature log. The temperature
log requires input from a temperature transducer/sensor. The most
recent temperature measured shows on the far right side of the
chart with the history trailing to the left. The dotted lines within the
chart indicate intervals in the temperature scale and the duration of
time.
The following settings are available:
• Temperature Scale—controls the temperature range for
showing the log. Select Auto to have the unit automatically
determine the best range, or select a span of 2, 4, 6, 8, or 10
degrees.
• Time Duration—controls the number of temperature
readings shown on the log. Shorter time durations shows a
greater the number of log points. Use longer time durations
to detect temperature trends, instead of immediate readings.
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GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > SYSTM TAB
Systm (System) Tab
The System tab controls system setting for beeper, speed filter,
languages, system mode, and simulator controls, restores factory
settings, shows software version, and prepares software update
cards.
The following settings are available:
• Beeper—Off, Alarms Only, Key and Alarm: controls audible
beeps for keys and alarms.
• Speed Filter—Off, Auto, On: averages speed-readings.
• Language—shows the on-screen languages.
• System Mode—sets Normal or Simulator Mode.
• Set Position*—sets your location while in Simulator Mode.
See page 3 for additional instructions.
• Track Control*—Auto Track, User Track: controls your
heading in Simulator Mode.
• Track*—sets your heading in Simulator Mode.
• Speed*—sets your speed in Simulator Mode.
• Transducer*—sets a transducer type.
* These fields are only available when the unit is in Simulator
Mode.
GPSMAP 198C Sounder Owner’s Manual
The following options are also available from the Systm tab:
• System Information—shows the unit’s software, basemap
version, and electronic serial number.
• Prepare SW Update Card—prepares a data card to accept
software updates from your computer through the data card
programmer.
Press MENU for the following options:
• Defaults—restores settings on Systm page to default values.
• All Unit Defaults—restores all settings to Garmin’s original
setup values for the entire unit.
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MAIN MENU > UNITS TAB
Units Tab
The Unit tab defines the Position Format, Map Datum, Heading,
Distance, Speed, Elevation, Depth, and Temperature units.
The following settings are available:
• Position Format—changes the coordinate system. You
should only change the position format if you are using a
map or chart that specifies a different position format or want
to use a format you are familiar with.
For additional information on Loran TD setup, see page 109.
NOTE: The Units tab settings affects how navigation
information appears on the GPSMAP 198C Sounder. When
in doubt, seek assistance. If you are using a map or chart in
conjunction with your GPS, make sure the settings under the
Units tab of the GPSMAP 198C Sounder match that of the
map or chart. This information should appear somewhere on
the map or chart. If the information is not present, contact the
map or chart maker to determine what position format, datum,
heading and units of measure are being used for the map or
chart.
70
• Map Datum—sets the datum reference used to determine
a given location. The default setting is WGS 84. The
unit automatically chooses the best datum depending on
your chosen position format. Datums are used to describe
geographic locations for surveying, mapping, and navigation.
You should only change the datum if you are using a map or
chart that specifies a different datum.
WARNING: Selecting the wrong map datum can result in
substantial position errors. Unless otherwise specified by
the navigation documentation you are using, use the default
WGS 84 datum for best overall performance.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > UNITS TAB
• Heading—selects the reference used in calculating heading
information. You can select from Auto Mag Var, True, Grid,
and User Mag Var. Auto Mag Var provides magnetic north
heading references that are automatically determined from
your current location. True provides headings based on a
true north reference. Grid provides headings based on a grid
north reference (and is used in conjunction with the grid
position formats described on page 70). User Mag Var allows
you to specify the magnetic variation at your current location
and provides magnetic north heading references based on the
variation you enter.
To enter a user defined magnetic variation:
1. With the Heading field set to User Mag Var, highlight the
heading reference field (immediately to the right), and press
ENTER.
2. Use the ROCKER to enter the magnetic variation at your
current location and press ENTER.
WARNING: If User Mag Var is selected, you must periodically
update the magnetic variation as your location changes. Using
this setting, the unit does not automatically calculate and
update the magnetic variation at your present location. Failure
to update this setting can result in substantial differences
between the information shown on your unit and external
references, such as a magnetic compass.
GPSMAP 198C Sounder Owner’s Manual
Manually enter a
magnetic variation.
• Distance, Speed and Elevation—allows you to select the
units of measure for distance, speed, and elevation readouts
in Nautical (nm, kt, m), Statute (mi, mh, ft), or Metric
(km, kh, m) terms.
• Depth—allows you to select the units of measure for depth
in Feet (ft), Fathoms (fa) or Meters (m).
• Temperature—allows you to select the units of measure for
temperature in Fahrenheit (°F) or Celsius (°C).
71
MAIN MENU > COMM TAB
Comm (Communications) Tab
The Comm tab controls the input/output format used when
connecting your GPSMAP 198C Sounder to external NMEA
devices, a DGPS beacon receiver, a personal computer, or another
Garmin unit.
NOTE: If a DGPS receiver is used, WAAS capability is
automatically turned to Off. See pages 99 and 100 for wiring
and NMEA version information.
The unit supports two input/output ports.
Port 1
• Garmin Data Transfer—is the proprietary format used
to upload/download MapSource data, exchange waypoint,
route, track, almanac, and proximity data with a PC or
another Garmin unit. When you select Garmin Data Transfer,
there are 11 Transfer Modes to choose from: Host, Request
Almanac, Request Proximity, Request Routes, Request
Tracks, Request Waypoints, Send Almanac, Send Proximity,
Send Routes, Send Tracks, and Send Waypoints.
• NMEA In/NMEA Out—supports the input/output of
standard NMEA 0183 data, and sonar NMEA input support
for the DPT, MTW and VHW sentences.
• None—provides no interfacing capabilities.
72
Port 2
• Garmin DGPS—supports connections with a Garmin DGPS
beacon receiver.
• Other DGPS—supports DGPS input using a standard
RTCM format, without any output capabilities.
• NMEA In/NMEA Out—supports the input/output of
standard NMEA 0183 data, and sonar NMEA input support
for the DPT, MTW and VHW sentences. You can also adjust
the NMEA output.
• RTCM In/NMEA Out—supports Differential GPS (DGPS)
input using a standard RTCM format and also provides
NMEA 0183 output.
• None—provides no interfacing capabilities.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > COMM TAB
To select a transfer mode:
1. Use the ROCKER to select Garmin Data Transfer in the
Serial Data Format field.
2. Highlight the Transfer Mode field, and press ENTER.
3. Use the ROCKER to select a setting, and press ENTER.
Advanced NMEA settings to adjust the NMEA output are available
if you have one of the ports set to NMEA In/NMEA. Advanced
NMEA settings enable/disable certain sentences and adjust the
number of Lat/Lon output precision digits. Settings affects both
Port 1 and Port 2 NMEA outputs.
When transferring data between two Garmin
units, always set one to Host and use the other
unit to either Send or Request the data.
To select an input/output format:
1. Select Port 1 or Port 2, highlight the Serial Data Format
field, and press ENTER.
2. Use the ROCKER to select a setting, and press ENTER.
GPSMAP 198C Sounder Owner’s Manual
73
MAIN MENU > COMM TAB
To adjust the NMEA output:
1. From the Comm tab, press MENU, highlight NMEA Setup,
and press ENTER.
2. Highlight an option, and press ENTER.
3. Use the ROCKER to select a setting, and press ENTER.
Press QUIT to return to the Comm tab.
To restore the Serial Data Format settings back to the
default Garmin Data Transfer:
From the Comm tab, press MENU, highlight Defaults, and
press ENTER.
If Garmin DGPS or RTCM In/NMEA Out format is selected,
additional fields are provided to control a Garmin differential
beacon receiver directly from your GPSMAP 198C Sounder. The
unit can automatically scan for the DGPS beacon signal, or you
can enter the beacon frequency and bit rate on the unit and the
information is used to tune the beacon receiver.
To have the unit automatically scan for a frequency:
Advanced NMEA Output
Setup Page
74
1. With the unit set to Garmin DGPS or RTCM In/NMEA Out,
use the ROCKER to highlight the Beacon field, and press
ENTER.
2. Highlight Scan, and press ENTER. The numbers in the
Frequency field changes as the unit scans from 284 kHz to
325 kHz, 200 bit rate, then 100 at 6-second intervals.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > COMM TAB
To manually enter a frequency and bit rate:
Status Field
SNR and
Distance shows
data when signal
is received.
NOTE: The DGPS beacon transmitters are operated by
the U.S. Coast Guard (or similar government agency in
other countries), and are responsible for their accuracy and
maintenance. For DGPS transmitter problems or to find the
most updated list of frequencies and coverage areas, contact
your local USCG, or see their Web site at
http://www.navcen.uscg.mil/.
To restart the scan:
Press MENU, highlight Restart Scan, and press ENTER.
GPSMAP 198C Sounder Owner’s Manual
1. With the unit set to Garmin DGPS or RTCM In/NMEA Out,
use the ROCKER to highlight the Beacon field, and press
ENTER.
2. Highlight User, and press ENTER.
3. Highlight the Frequency or Bit Rate field, press ENTER,
enter a frequency or bit rate, and press ENTER when
finished.
The Status field shows one of the following:
• Tuning—the unit is attempting to tune to the specified
frequency and bit rate.
• Scanning—the unit is automatically scanning through the
frequencies and bit rates.
• Receiving—the unit is receiving DGPS signal and ready for
operation.
• Check Wiring—the unit is not making connection with
DGPS receiver.
When the unit is receiving a DGPS signal, the SNR (Signal to
Noise Ratio) and Distance fields show data. The SNR range is
0dB to 30dB, with 30 being the best. The Distance can or can not
show data, depending on the signal being broadcast from the
DGPS site.
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MAIN MENU > ALARM TAB
Alarm Tab
The Alarm tab allows you to define the alarm settings. The Alarm
tab is divided into three sub tabs: System alarms, Nav alarms, and
Sonar alarms.
System Sub Tab
• Clock—provides an alarm for the system clock. Enter a
time in the time field, and turn the alarm on and off from
the control field menu. Remember to enter alarm times in
the same time format (UTC or local) you are using for your
system. The unit must be on for the clock alarm to work.
• Battery—sets an alarm to sound when the battery is
reaching a critical state of discharge.
• DGPS and Accuracy—DGPS alarm sounds when the unit
loses a differential fix. The accuracy alarm sounds when the
GPS position accuracy falls outside the user-set value.
Nav Sub Tab
• Anchor Drag—sets an alarm to sound when you have
exceeded a specified drift distance. Enter a value in the
distance field, and use the control field to turn the alarm on
and off.
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• Arrival—sets an alarm to sound when at specified distance
or time away from a destination waypoint. Enter a distance
radius or time for sounding the alarm and use the control
field to set the alarm to Off, Dist (Distance), or Time.
• Off Course—sets an alarm to sound when you are off
the course by a specified distance. Enter a distance in the
distance field and use the control field to turn the off course
alarm on and off.
Sonar Sub Tab
You must be receiving sonar NMEA data for these functions to
work. See “Using Sonar” page 78 for more information.
• Shallow Water/Deep Water—set alarms to sound when
you enter an area of specified depth that is too shallow or too
deep. Enter a depth in the distance fields and use the control
fields to turn the alarms on and off.
• Water Temperature—sets an alarm to sound when the
transducer reports a temperature either above, below, inside,
or outside the specified values.
• Fish—sets alarm to sound when unit detects a fish of the
specified symbol size.
GPSMAP 198C Sounder Owner’s Manual
MAIN MENU > ALARM TAB
To set an alarm:
Use the ROCKER to highlight a sub tab.
Highlight the field you want to start, and press ENTER.
Change the mode to the setting, and press ENTER.
Highlight the next field to the right, press ENTER, enter
settings, and press ENTER to finish.
5. If you want the alarm to appear and beep until
acknowledged, highlight the Persist box, and press
ENTER.
1.
2.
3.
4.
GPSMAP 198C Sounder Owner’s Manual
If Persist is checked,
an alarm stays active
until acknowledged.
Press ENTER to
acknowledge an
alarm.
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USING SONAR > SONAR PAGE
USING SONAR
This section covers the additional sonar options for the
GPSMAP 198C Sounder when used in conjunction with a
transducer. Read the Installation Instructions to properly install the
transducer.
NOTE: You MUST have a transducer installed and connected
to your GPSMAP 198C Sounder to use the sonar features.
Sonar Page
The Sonar Page is where your GPSMAP 198C Sounder becomes a
powerful fishfinder/flasher. To view the Sonar Page, press PAGE or
QUIT repeatedly until it shows. Fish are shown as colored arches
or as fish icons. Both fish icons and arches appear in three different
sizes. Thermoclines are shown as shades of blue. The area of
strongest sonar return shows as solid white (if Whiteline is active.
Typically, the bottom is the primary whiteline. A thin whiteline
indicates a soft bottom and a thick whiteline follows the contour
of the bottom and show any objects of reasonable size. For more
information on understanding sonar and the screen, see page 89.
Adjustment
Menu
Sonar Page
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GPSMAP 198C Sounder Owner’s Manual
USING SONAR > SONAR PAGE
Using the Adjustment Menu
The Adjustment Menu gives you direct access to the settings and
features most commonly used on the Sonar Page. The option
selected currently appears in the upper left of the screen.
Press MENU and
highlight
Adjustments to see
a list of all options
and their current
settings.
To select an adjustment option from the Sonar Page:
1. Press the ROCKER left or right to scroll through the options
in the upper left of the screen.
2. Press ENTER to access the option’s adjustment window.
Or
1. Press MENU, highlight Adjustments and press ENTER. A
list of all options and their current settings appears, with the
selected option highlighted.
GPSMAP 198C Sounder Owner’s Manual
2. Press up or down on the ROCKER to select the option, and
press ENTER to access the adjustment window
3. To exit any of the adjustment options, press QUIT.
To change an Adjustment Menu setting:
1. Select an adjustment option to change using one of the
two methods described previously. The adjustment window
automatically times out and disappears when the unit is idle
for 20 seconds.
2. Press the ROCKER up or down to place the pointer
or setting bar at the setting, range, or percentage
(Off, 1-100%).
3. Press ENTER or QUIT to exit the adjustment window,
or press left or right on the ROCKER to view another
adjustment window.
To change a setting back to Normal or Auto:
1. While on the adjustment window for the option, press
MENU.
2. Select the setting, and press ENTER.
79
USING SONAR > SONAR PAGE
Zoom Adjustment
Range Adjustment
Range—sets the screen depth range used for viewing. The unit can
be set to automatically track the bottom or set to a user-specified
depth range. Auto mode shows the most information possible while
continuously showing the bottom.
Zoom—used to quickly select a screen zoom scale or split
the screen. When a scale other than No Zoom is selected, the
Adjustment Menu shows a new selection labeled View. The Zoom
setting is divided into six levels:
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4X Split Zoom (Dual Frequency Mode)
• 2X Split—shows two reduced-size sonar pictures at the
same time. The right half of the screen shows the complete
sonar picture at its original scale. The left half shows a
portion of the original picture at 1/2 depth scale.
• 2X Zoom—shows the 2X zoomed picture on the full screen
and does not show the original depth scale.
• 4X Split—shows two reduced pictures; the right at the
original depth scale and the left at 1/4 the original depth
scale.
• 4X Zoom—shows only the 4X zoomed picture on the full
screen. However, if Dual Frequency screen is set to Split,
then a 50/200kHz split screen shows.
GPSMAP 198C Sounder Owner’s Manual
USING SONAR > SONAR PAGE
• Btm (Bottom) Split—shows two reduced pictures; the right
at the original depth scale and the left showing sonar returns
from the bottom up. All target depths read as a distance from
the bottom.
• Btm (Bottom) Lock—shows only the Bottom Lock picture
(returns from the bottom up) on the full screen. However, if
Dual Frequency Screen is set to Split, then a 50/200kHz split
screen shows.
When started, the zoomed picture becomes the Sonar Page. You
can also cycle through the sonar zoom levels by pressing the IN
or OUT keys. The Zoom function can be stopped by pressing the
OUT key until the No Zoom setting appears.
View/Span—available when a Zoom scale other
than No Zoom is selected. The View or Span setting
is used to change the viewing range of a zoomed
screen. If the Zoom is set to 2X split or 4X split,
only the zoomed portion on the left side of the
screen is affected by the change. If the Zoom is set
to Bottom Split or Bottom Lock, Span adjusts how
far off the bottom the unit shows data. In Zoom
View
Adjustment mode, you can control the view of the left side of
the split.
GPSMAP 198C Sounder Owner’s Manual
Gain—allows you to control the sensitivity
of the unit’s receiver. This provides some
flexibility in what is seen on the screen.
To see more detail, increase the receiver
sensitivity by selecting a higher gain
percentage. If there is too much detail
or if the screen is cluttered, lowering the
sensitivity can increase the clarity of the
screen.
Target Level
Selection
Gain Adjustment
Target Level—adjusts how dark or light a return
(or target) is shown on-screen. A Color Bar (see
page 86) appears on the right side of the screen as
you adjust this setting. The higher the percentage,
the darker the return appears. This setting does
not increase or decrease the unit Gain.
81
USING SONAR > SONAR PAGE
Whiteline—controls how the unit shows information
about the bottom type (hard or soft). With the
Whiteline Off, the bottom return shows as red and
contains no information on bottom hardness. With
Whiteline set at Normal or 1-100%, the bottom return
becomes white with a red line indicating where the
water meets the bottom. To turn the Whiteline Off,
Whiteline press the ROCKER down until the setting bar is all
Adjustment the way at the bottom of the range and reads Off. See
page 91 for more detail on this feature.
Frequency—allows you to choose a transducer
frequency. Frequency refers to the pitch of the sound
that the transducer sends and receives. You can
choose 200kHz, 50kHz, or Dual frequency.
Frequency
Adjustment
Depth Line—adds a horizontal depth
line across the screen that is used to measure the
depth of underwater objects. The depth of the
line appears in a box on the right side of the line.
Press up or down on the ROCKER to control the
position of the line on the graph. The depth shows
in a window on the right side of the line. To turn the
Depth Line Depth Line Off, press the ROCKER up until the
Adjustment setting bar is all the way at the top of the range and
reads Off.
82
Noise Reject—helps filter unwanted noise from
the graph. The Noise Reject tool can be turned
Off, set to Normal (automatically adjusts for
optimum viewing), or to a fixed 1-100% setting.
When setting the Noise Reject tool: the HIGHER
the noise rejection setting, the less likely the unit
is to NOT show fish or structure. To turn the
Noise Reject Noise Reject Off, press the ROCKER down until
Adjustment the setting bar is all the way at the bottom of the
range and reads Off.
Scroll—adjusts the rate that the graph scrolls from
right to left. If you are sitting still or the graph is
moving too fast, slowing the scroll rate or pausing it
can be beneficial.
Scroll
Adjustment
GPSMAP 198C Sounder Owner’s Manual
USING SONAR > SONAR PAGE
Sonar Page Options
The GPSMAP 198C Sounder’s Sonar Page features a menu that
provides access to additional functions and to layout and data field
options.
To change an Adjustment setting:
1. While on the Adjustment options list, use the ROCKER to
highlight the option, and press ENTER.
2. Use the ROCKER to make the change, and press ENTER.
Show/Hide Pointer—allows you to reference sonar items and
mark underwater waypoints. This makes it easier to find and use
an object such as a stump for a future fishing location. When using
this feature, the Sonar Page pauses. The pointer does not move off
the paused screen and cannot show an area that has scrolled off
the screen. The depth is updated while the screen is paused, but
the unit does not show any new sonar data until the standard Sonar
Page is resumed. You can see a discontinuity from where the sonar
information stops to where it starts again.
Sonar Page Menu Options
To show the Sonar Page options:
Data Window
Press MENU.
To select a menu option:
Use the ROCKER to highlight the option, and press
ENTER.
Pointer
The following options are available:
Adjustments—lists the Adjustment Menu options and their current
settings (see page 79).
GPSMAP 198C Sounder Owner’s Manual
Show Pointer Option
83
USING SONAR > SONAR PAGE
To mark an underwater waypoint:
1. From the Sonar Page, press MENU, highlight Show
Pointer, and press ENTER to pause the screen movement.
2. Use the ROCKER to move the cursor onto the target, such
as underwater drop offs and stumps, you want to mark. The
data window at the top of the screen shows the cursor’s
depth, coordinates, bearing and distance from your current
position.
3. Press ENTER/MARK. The New Waypoint Page appears
with the waypoint’s coordinates, default three-digit name,
and pointer depth automatically filled in.
4. To change the name, symbol or depth, highlight the
appropriate field and press ENTER. Make your changes
and press ENTER when finished.
5. When finished, highlight OK, and press ENTER.
6. To return to the standard Sonar Page, press QUIT; or press
MENU, highlight Hide Pointer, and press ENTER.
84
Show/Hide Numbers—toggles showing/hiding the data fields on
the Sonar Page.
Show Numbers Option
Change Numbers—allows you to specify the type of data shown
in each data field. For detailed instructions on changing the data
fields, see page 31.
Size Split—enables width adjustment of the Sonar Page split
screen. This option is available only when a split screen zoom scale
is selected. You can adjust the size of the split window anywhere
from 1/4 to 3/4 width of the right half of the Sonar Page.
GPSMAP 198C Sounder Owner’s Manual
USING SONAR > SONAR TAB OPTIONS
Double-Arrow
Size Split Menu Options
Resizing the Split Sonar Page
Sonar Tab Options
To access and change a setting on the Sonar tab:
1. Press MENU twice to access the Main Menu. Use the
ROCKER to highlight the Sonar tab.
2. Using the ROCKER, highlight the field, and press ENTER.
3. Highlight the setting, and press ENTER.
4. Press QUIT to return to the Sonar Page or a previous page.
GPSMAP 198C Sounder Owner’s Manual
Fish Symbols—allows you to determine how the graph shows
underwater targets and background information. If fish symbols
are set to Off, the unit shows all available information about the
underwater environment. If a fish symbol is selected, the graph
shows only the information related to that symbol. Actual fish
returns can not always appear as perfect arches (like in Simulator
Mode), due to the speed, fish orientation, or other conditions.
Fish Symbols Off— All available information is shown.
Suspended targets show as fish symbols. Background
information is shown.
Same as above with the target depth attached.
Suspended targets show as fish symbols. No background
information is shown.
Same as above with target depth attached.
Water Type—because sound waves travel through fresh and salt
water at different rates it is necessary to select the water type to
ensure accurate readings on the unit.
85
USING SONAR > SONAR TAB OPTIONS
Depth Number—controls the efficiency of the digital depth update
rate. Fast Update updates more quickly and is recommended for
low-noise, deeper water (>50 ft) Auto is best for shallow water or
high noise areas, and produces a slower screen update. Use Auto
when you travel a wide variety of depths.
NOTE: If the unit is unable to track the bottom for any reason,
the digits in the depth window flash on and off to alert you that
the unit is not tracking the bottom.
Color Bar—shows a gradient scale of the current Target Level
setting (see page 81).
Depth Scale (Overlay)
Color Bar
Flasher
Main Menu—Sonar Tab
Flasher—with the Flasher active, a graphic Flasher representation
shows on the far right side of the graph. This graphic Flasher shows
structure and bottom returns much the same as a true Flasher. This
feature is particularly useful when using Fish Symbols.
Scale—controls the depth Scale shows vertically along the right
side of the graph. The depth Scale can be configured to show four
different ways: as an Overlay, in the Corners, with Basic, or No
Scale.
86
GPSMAP 198C Sounder Owner’s Manual
USING SONAR > SONAR TAB OPTIONS
Keel Offset—used to offset the surface reading for the depth of
a keel. This makes it possible to measure depth from the bottom
of your keel instead of from the transducer’s location. Enter a
positive number to offset for a keel, or enter a negative number to
compensate for a large vessel that can draw several feet of water.
The Keel Offset reflects in the depth reading.
Keel Offset:
Transducer at
Surface Enter (+)
positive number to
show depth from
bottom of keel
Background Color—sets the background color on the Sonar Page
to Black, Blue, or White.
Calibrate Water Speed—this is only available if you are using
a speed-capable transducer/sensor. Calibration is required to
ensure the Water Speed shown on your unit is accurate. The
unit automatically use the GPS ground speed, if it is available,
for comparison on the calibration. If a GPS ground speed is not
available, use either your boat’s speedometer reading (not always
accurate) or a stopwatch to determine your speed over a certain
distance (distance / time = speed). It is recommended that the
calibration take place in water having little or no current.
Keel Offset: Transducer
at Bottom of Keel Enter
(-) negative number to
show depth from surface
Map Split Sonar Detail—controls Map Page sonar split range
scale. Full Range shows the entire scale of 2X or 4X left side split
of Sonar Page. Maximum Detail shows what is shown on the left
side of a split sonar screen.
GPSMAP 198C Sounder Owner’s Manual
Calibrating the
Speed Sensor
87
USING SONAR > SONAR TAB OPTIONS
To calibrate the water speed:
1. On the Sonar tab, use the ROCKER to highlight Calibrate
Water Speed and press ENTER.
2. Bring the boat to a cruising speed. The top ground and
uncalibrated water speeds are shown at the bottom of the
calibration window. Note your top water speed, then stop
the boat and press ENTER.
3. By default, the top ground speed automatically shows in the
What was your top water speed? field. If a ground speed
is not available, the top uncalibrated water speed is used
instead. If the new speed is correct, highlight OK and press
ENTER. If you want to manually enter a calibration, press
ENTER on the speed field, enter a new speed, and then
press ENTER.
4. You can also press MENU on the calibration screen and
choose Use Top Ground Speed to default back to ground
speed or Use No Calibration to use the speed sensor’s
uncalibrated speed.
88
NOTE: If the boat is not moving fast enough or the speed
sensor is not outputting a speed, the message “Boat Is Not
Moving Fast Enough To Calibrate” appears at the bottom of
the screen. Either verify the speed sensor wheel is moving, or
safely increase boat speed. If there is a problem with the speed
sensor/unit, or if a speed senor is not installed, a “Water Speed
Sensor Is Not Working” message appears at the bottom of the
screen. Check connections of speed sensor cables.
Page Defaults—restores the Sonar Page settings to the original
factory setup.
To restore default settings to the Sonar Tab:
1. Press MENU.
2. Highlight Page Defaults, and press ENTER.
To restore default settings to the Sonar Tab:
Press MENU. With Page Defaults highlighted, press
ENTER.
GPSMAP 198C Sounder Owner’s Manual
USING SONAR > SONAR TAB OPTIONS
Understanding Sonar
The transducer mounted on your vessel transmits sound waves
toward the bottom of a lake, stream, or seabed in a cone-shaped
pattern. When a transmitted sound wave strikes an underwater
object—such as the bottom, a piece of structure, or a fish—sound
is reflected back to the transducer. The transducer collects the
reflected sound waves and sends the data to the GPSMAP 198C
Sounder to process and show. The underwater data is shown on the
Sonar Page in the order that it is returned: first returned is the first
on the screen.
Generally speaking, if the only thing between the transducer and
the bottom is water, the first strong return comes from the bottom
directly below the transducer and sets the bottom level. Weaker
secondary returns provide the detailed data. Stronger returns show
in darker colors, with red being the strongest return.
Understanding the Sonar Screen
One of the first things to understand about sonar is that the
transducer sends a beam down to the bottom of the water, much
like the beam of a flashlight. The beam starts small near your
vessel and expands as it gets to the bottom. Refer to “Transducer
Coverage” for more detailed information.
The Sonar Page does not show a three-dimensional representation
of the underwater environment; the screen is in two-dimensions,
much like if you took a picture of an aquarium. Only the depth of
the item in the water is shown. The Sonar screen does not show
you where an item is located horizontally in the water, as shown in
the drawings below. The fish is not directly above the tree in reality,
but it can look like it is on the Sonar Page.
Fish
1'
10'
Tree
Tree
20'
Aerial View of the Water
GPSMAP 198C Sounder Owner’s Manual
Sonar Page
89
USING SONAR > UNDERSTANDING SONAR
Transducer Coverage
The area covered by the transmitted sound waves is determined
by the cone angle of the transducer and the water depth. The wide
cone angles (40°) associated with low frequencies (50 kHz) provide
a large coverage area for finding fish within a coverage width that
is approximately 2/3 of the water depth. However, this also means
that wide cone angles produce less bottom detail and resolution.
As shown in the drawing on the near right, the 40° cone angle
produces a coverage area of approximately a 20-foot diameter
circle at a 30-foot depth.
The narrow cone angles (10°) associated with the high frequencies
(200 kHz) provide better bottom resolution and crisper detail, but
cannot show a large coverage area for finding fish. The 10° cone
angle provides a coverage width that is approximately 2/10 of the
water depth. As shown in the drawing on the far right, the 10° cone
angle produces a coverage area of approximately a 6-foot diameter
circle at a 30-foot depth.
Coverage
Diameter
Depth
Coverage
Diameter
40° Cone Angle (50 kHz)
Depth
10° Cone Angle (200 kHz)
Dual frequency mode combines both frequencies to get the best
coverage area and contour/depth readings.
90
GPSMAP 198C Sounder Owner’s Manual
USING SONAR > UNDERSTANDING SONAR
Whiteline
When the sonar sound waves are reflected back by the bottom,
a hard bottom returns a stronger signal than a soft bottom. A
thin whiteline indicates a softer bottom, while a thick whiteline
indicates a harder bottom. Normally, a red line is used to show the
point where water meets the bottom. This line follows the bottom
contour, along with any significant objects lying on the bottom.
The unit uses the whiteline function to make the bottom layer
information easier to distinguish.
Thermoclines
A rough definition of a thermocline is a break in water where
the water temperature changes faster than the water above it.
Thermoclines are shown as the weakest colors.
One of the unique features offered by Garmin is See-Thru®
technology, which allows the GPSMAP 198C Sounder to hear
both weak and strong signals simultaneously so as to identify
fish returns under the toughest conditions, such as suspended in
thermoclines or even hiding near structures. See-Thru technology
allows the transducer to see through thermoclines and locate fish.
Thick
Whiteline: Hard
bottom
Whiteline On
GPSMAP 198C Sounder Owner’s Manual
Whiteline Off
Thermocline
91
APPENDIX > SPECIFICATIONS
Specifications
APPENDIX
Physical Specifications
Size: 6.2" H x 6.30" W x 3.7" D (15.7 cm x 16.0 cm x 6.7 cm)
Weight: Less than 2.0 lb
Display: 5.0" diagonal (12.7 cm) 16-color TFT display with
backlighting (234 x 320 pixels)
Case: Fully gasketed, high-impact plastic alloy, waterproof to IEC
529-IPX-7
Temp. Range: 5°F to 158°F (-15°C to 70°C)
Performance
Receiver: Differential-ready 12 parallel channel WAAS capable
receiver
Acquisition Times:
Warm: Approx. 15 seconds
Cold: Approx. 45 seconds
AutoLocate: Approx. 2 minutes
Update Rate: 1/second, continuous
GPS Accuracy:
Position: <15 meters (49 feet), 95% typical*
Velocity: 0.05 meters/sec steady state
92
DGPS (USCG) Accuracy:
Position: 3-5 meters (10-16 feet) with optional Garmin
DGPS receiver, 95% typical*
Velocity: 0.05 meters/sec steady state
DGPS (WAAS) Accuracy:
Position: <3 meters (10 feet), 95% typical*
Velocity: 0.05 meters/sec steady state
Dynamics: 6gs
* Subject to accuracy degradation to 100 m 2DRMS under the U.S.
DOD-imposed Selective Availability Program.
Power
Source: 10-32 V DC
Usage: 14 watts max. at 13.8 vDC
Fuse: AGC/3 AG-3 Amp
Sonar
Sounder Power: 500 watts (RMS)
4000 watts (peak to peak)
Frequency: 50/200 kHz (40°/10°)
Depth: 1500 foot max depth*
* Depth capacity is dependent on water salinity, bottom type, and other water conditions.
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > INSTALLING THE GPSMAP 198C SOUNDER
Installing the GPSMAP 198C Sounder
The GPSMAP 198C Sounder must be properly installed according
to the following instructions to get the best possible performance.
To complete the installation, you need the appropriate fasteners and
a 1" x 14-thread marine antenna mount available at most marine
dealers.
Mounting the GPS Antenna
The antenna should be mounted in a location that has a clear,
unobstructed view of the sky in all directions to ensure the best
reception. Avoid mounting the antenna where it is shaded by the
boat’s superstructure, a radome antenna, or mast. Sailboat users
should avoid mounting the antenna high on the mast to prevent
inaccurate speed readings caused by excessive heeling. Most
marine VHF and LORAN antennas should not seriously degrade
the GPS antenna’s reception. Never paint the antenna or clean it
with harsh solvents.
GPSMAP 198C Sounder Owner’s Manual
Suggested locations for mounting the external antenna.
The Garmin antenna screws directly onto any standard 1" x 14thread antenna mount. If you need to raise the antenna to avoid
shading, try using a 1" x 14-thread extension mast available at most
marine dealers.
NOTE: It is possible to route
the coaxial cable either through,
or outside the antenna mount. It
is possible to remove the BNC
connector on the coaxial cable
and the coaxial cable shortened
to ease installation, however,
doing so voids the antenna
warranty. If the BNC connector
is removed, it must be replaced
with a new solder-on or crimp
BNC connector.
93
APPENDIX > MOUNTING THE GPSMAP 198C SOUNDER
To install the GPS antenna:
1. Screw the antenna directly onto the 1" x 14-thread mount.
2. Route the cable to the mounting location of the unit. Use the
appropriate tie-wraps, fasteners, and sealant to secure the
cable along the route and through any bulkhead or deck.
3. After the GPSMAP 198C Sounder unit is installed, connect
the cable to the antenna connector on the back of the unit.
Make sure that you turn the antenna cable connector 1/4
turn clockwise to lock the cable into place.
Mounting the GPSMAP 198C Sounder
Using the Gimble Mount
The GPSMAP 198C Sounder’s compact, waterproof case is
suitable for mounting in exposed locations or at the nav station.
The unit comes with a gimbal bracket that can be used for surface
or overhead mounting. When choosing a location for the unit,
consider the following conditions:
• There should be at least a 3" (7 cm) clearance behind the
case to allow connection of the antenna and power/data
cables.
• The mounting surface should be heavy enough to support the
unit and protect it from excessive vibration and shock.
NOTE: The temperature range for the GPSMAP 198C
Sounder is 5°F to 158°F (-15°C to 70°C). Extended exposure
to temperatures exceeding this range (in storage or operating
conditions) can cause failure of the screen. This type of
failure and related consequences are NOT covered by the
manufacturer’s limited warranty.
94
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > MOUNTING THE GPSMAP 198C SOUNDER
5. Screw the two mounting knobs through the bracket and into
the screen case.
6. Connect the power/data and antenna cables (external
antenna only) to the back of the unit, making sure the
locking rings are fully tightened on both connectors.
Flush Mounting the GPSMAP 198C Sounder
The GPSMAP 198C Sounder can be flush mounted on a flat
panel. When flush mounting the GPSMAP 198C Sounder, be sure
to choose an appropriately sized location for the unit (see unit
dimensions on page 93) and leave 1.25" (32 mm) clearance below
the data card slot for inserting or removing data cards. A Flush
Mount Template is provided in the package. Use the instructions on
the template to complete the flush mount installation.
To install the GPSMAP 198C Sounder:
1. Select a location for the mounting bracket.
2. Mark and drill the four mounting holes for the fastener you
are using.
3. Fasten the bracket to the surface using the appropriate
fastener.
4. Insert the GPSMAP 198C Sounder into the mounting
bracket. The bracket is designed for a tight fit to provide
additional support when swiveling the unit.
GPSMAP 198C Sounder Owner’s Manual
95
APPENDIX > INSTALLING THE TRANSDUCER
Installing the Transducer
The transducer acts as the eyes and ears of your new sonar. Proper
transducer installation is critical to the operation of your unit. The
transducer transmits sound waves toward the bottom in a cone
shape. The larger the cone angle, the larger the coverage area at a
given depth.
Wide cone angle
A 50/200 kHz dual frequency 40°/10° cone angle, temperature
sensing, transom mount transducer is included in the
GPSMAP 198C Sounder (with transducer) package. This
transducer provides good all-around performance.
Narrow cone angle
dead zone
fish not seen
A wide cone angle transducer works best in shallow water. The
wide cone angle provides a large coverage area, but at a decreased
bottom resolution. In deeper water this can result in a large dead
zone where fish cannot be seen. A narrow cone angle transducer
is better suited to deep-water installations. The narrow cone angle
provides a smaller viewing area (compared to a wide cone angle
transducer at the same depth) with improved bottom resolution and
a smaller dead zone. Dual frequency transducers give you the best
of both wide and narrow cone angles.
X
X
96
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > INSTALLING THE TRANSDUCER
Transom Mount Transducer
The following diagram is for mounting the transducer included with the GPSMAP 198C Sounder with transducer package. If the
transducer lead is too short, extension cables are available from your Garmin dealer. DO NOT cut the transducer lead or any part of the
transducer cable, as this will void your warranty. The cable cannot be spliced and connected to any existing (Garmin or non-Garmin)
transducer cables.
NOTE: DO NOT mount the transducer behind strakes, struts, fittings, water intake, or discharge ports, or anything that creates air bubbles or
causes the water to become turbulent. It is important that the transducer is in clean (non-turbulent) water for optimal performance.
Apply marine sealant to all
screw threads to prevent water
from seeping into the transom.
Mount the transducer cable cover
well above the waterline.
Transducer should extend 1/8" below
fiberglass hull or 3/8" below aluminum hull
OK
Make sure that the transducer is
below water level when the boat
is on plane at high speed
Do not mount transducer directly in the
path of the prop. The transducer can cause
cavitation that may degrade the boat's performance
and damage the prop.
Mount the transducer parallel with the bottom.
GPSMAP 198C Sounder Owner’s Manual
97
APPENDIX > CARE INFORMATION
Care Information
Cleaning the Unit
The GPSMAP 198C Sounder is constructed of high quality
materials and does not require user maintenance other than
cleaning. Clean the unit using a cloth dampened with a mild
detergent solution and then wipe dry. Avoid chemical cleaners and
solvents that can damage plastic components.
Storing the GPSMAP 198C Sounder
Immersing the Unit in Water
The GPSMAP 198C Sounder is waterproof to IEC Standard 60529
IPX7. It can withstand immersion in 1 meter of water for 30
minutes. Prolonged submersion can cause damage to the unit. After
submersion, be certain to wipe and air dry the unit before reuse.
To resolve problems that cannot be remedied using this manual,
contact Garmin Product Support in the U.S. at 800/800-1020 or
Garmin Europe at 44/0870-8501241.
Do not store the GPSMAP 198C Sounder where prolonged
exposure to temperature extremes can occur (such as in the trunk
of a car) as permanent damage can result. User information, such
as waypoints and routes are retained in the unit’s memory without
the need for external power. It is always a good practice to back up
important user data by manually recording it or downloading it to a
PC (transferring it to MapSource.)
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GPSMAP 198C Sounder Owner’s Manual
APPENDIX > CONNECTING THE POWER/DATA CABLE
Connecting the Power/Data Cable
The power/data cable connects the GPSMAP 198C Sounder to
a DC system and provides interface capabilities for connecting
external devices. The color code in the diagram below indicates
the appropriate harness connections. Replacement fuse is a
AGC/3AG - 3 Amp fuse.
NOTE: During a typical installation, only the Red and Black
wires are used. The other wires do not have to be connected for
normal operation of the unit.
(TX COM 2)
DC Positive
(RX COM 2)
(TX COM 1)
DC Power
Source
(RX COM 1)
COM 1 Tx
COM 1 Rx
COM 2 Tx
COM 2 Rx
GPSMAP 198C Sounder Owner’s Manual
99
APPENDIX > INTERFACING
Interfacing
The following formats are supported for connection of external
devices:
Garmin proprietary Differential GPS (DGPS), NMEA 0183
versions 2.3, ASCII Text Output, RTCM SC-104 input (vs. 2.0).
The following are the sentences for NMEA 0183, vs. 2.3 output:
Approved sentences—GPRMC, GPGGA, GPGSA, GPGSV,
GPGLL, GPBOD, GPRTE, and GPWPL.
Proprietary sentences—PGRME, PGRMZ, and PSLIB. The
GPSMAP 198C Sounder accepts NMEA input with support for the
DBT, DPT, MTW, and VHW sentences.
100
The GPSMAP 198C Sounder also includes NMEA input with
support for the WPL sentence and sonar NMEA input with support
for the DPT (Depth), MTW (Water Temp) and VHW (Water Speed
& Heading) sentences. If connecting to COM 2 for sonar NMEA
input, the unit interface must be set to NMEA In/NMEA Out. If
connecting to COM 1, the unit must be set to NMEA In/NMEA
Out.
You can download a copy of Garmin’s proprietary communication
protocol on the Help and Support section of our Web site at
www.garmin.com.
Complete information regarding NMEA and RTCM formats is
available for purchase at www.nmea.org
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > INSTALLING AND REMOVING DATA CARDS
Installing and Removing Data Cards
The GPSMAP 198C Sounder uses optional Garmin marine
BlueChart and MapSource data cards to show digital charts and
maps on-screen. Data cards are installed in the card slot located at
the bottom right of the unit. Data cards can be installed or removed
at any time, whether the unit is on or off.
To remove a data card:
1. Open the card door by pressing together on the two handles
at the bottom of the door and lifting it up and open.
2. Grasp the card handle at the bottom and pull down firmly.
3. If the unit is on, a confirmation tone sounds when the data
card has been removed.
To install a data card:
1. Open the card door by pressing together on the two handles
at the bottom of the door and lifting it up and open.
2. Insert the card, with the label facing front and the handle
bottom, into the slot.
3. Firmly push the card into the unit. It in not necessary to
force the card and about 1/2" is still exposed when it is
properly inserted. If the unit is on, a confirmation tone
sounds and a message shows on-screen noting the card
details when the card is properly installed and accepted.
4. Close the cover.
If you insert a data card and get a “card format not recognized”
message, try removing the card and reinserting it. If the card is still
not recognized, contact Garmin Support or your Garmin dealer
for assistance. Data cards are not waterproof and should not be
exposed to moisture or excessive static charges. Data cards should
be stored in the case supplied with the card.
GPSMAP 198C Sounder Owner’s Manual
The first time you insert a data card, the unit takes a few seconds to
read the card.
After the data card is read, a summary screen appears. Press
ENTER to acknowledge.
101
APPENDIX > SATELLITE INFORMATION
Satellite Information
Satellite Strength Indicator Bars
90°
Center dot - 90°
above the horizon
Inner ring- 45°
above the horizon
Outer ring the horizon
45°
Satellite Sky View
Satellite Location
The location of each available satellite shows over two location
rings on the Satellite Information Page. The outer ring represents
the horizon, the inner ring represents 45° above the horizon, and
the center represents directly overhead. When the unit is using a
satellite for navigation, the satellite number is highlighted on the
location rings. The unit can be set to show satellite location with
North or your current track at the top of the screen.
102
The Satellite Strength Indicator Bars show the strength of the
signal being received, and the status of the signal. The bars are
either shaded or filled. The gray bar means the GPS is in the
process of storing orbital data it is receiving from the satellite
signal. When the bar turns solid, the GPS is using the satellite
signal for navigation. A “D” in or above the bar means that
differential corrections (WAAS or DGPS) are being applied to that
satellite.
Date, Time, and Current Location
The GPS gets date and time information from the satellite’s onboard atomic clock. When the GPS receiver has achieved a 2D
or 3D GPS location, the current location appears in the selected
location format.
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > WHAT IS A WAAS AND DGPS?
What is WAAS?
The Wide Area Augmentation System (WAAS) is an F.A.A. funded
project to improve the overall integrity of the GPS signal. It is
a space-based system that broadcasts integrity information and
correction data as determined by ground reference stations. WAAS
testing completed in September 2003 confirmed an accuracy of 2
to 3 vertical meters throughout the majority of the continental U.S.
and portions of Alaska. For more information, go to
http://gps.faa.gov/Programs/WAAS/waas.htm.
What is Differential GPS (DGPS)?
The U.S. and Canadian governments (among others) have set up
Differential GPS (DGPS) stations to transmit correction signals.
They are operational in coastal areas and on many navigable river
systems. The DGPS system is available for use without a fee.
Refer to the U.S. Coast Guard’s Web site,
http://www.navcen.uscg.gov/ for locations and the status of the
differential sites. Using DGPS requires additional equipment.
NOTE: If you are using the GPSMAP 198C Sounder outside
of the U.S.A., we recommend you turn off WAAS for the most
accurate location fix.
GPSMAP 198C Sounder Owner’s Manual
103
APPENDIX > WHAT IS MMSI?
What is a Maritime Mobile Service Identity
(MMSI)?
Maritime Mobile Service Identity (MMSI) basically allows a VHF
radio to act like a phone. In order to make a “call” on a phone,
you first need a phone number to dial. The 9-digit MMSI number
acts like a phone number when used in a Position Report and as a
unique identifier to the Coast Guard when used in an emergency
Distress Call. In order to obtain a Maritime Mobile Service Identity
(MMSI) number, users must register their VHF radio with the FCC
(Form 605). Garmin does not supply this number.
How ARE MMSI assignments obtained?
Non-commercial users (for example, recreational users who remain
in domestic waters and only carry VHF, EPIRB (Emergency
Position Indicating Radio Beacons), and Radar) are not required to
have a FCC ship station license. The FCC and Coast Guard have
authorized some second and third party vendors to assign MMSI
numbers. This service is limited to registering recreational vessels
only. To receive information on how to obtain a recreational MMSI
number, contact: http://www.uscg.mil/rescue21/links/mmsi.htm or
http://wireless.fcc.gov/marine/.
104
U.S Non-Federal User: Commercial users, or those who travel
outside the U.S. or Canada, must apply for a ship station license, or
an amendment to a ship station license. To find out if you require
a Ship Station license contact: http://wireless.fcc.gov/marine/
fctsht14.html. If your vessel requires licensing by the FCC you
obtain a MMSI during the application/licensing process when you
file FCC Forms 159 and 605.
U.S. Federal User: Federal users can obtain MMSI assignments
from their agency radio spectrum management office. These
procedures are currently under review by the NTIA (National
Telecommunications and Information Administration).
Outside the U.S.: Users can obtain an MMSI assignment from their
telecommunications authority or ship registry, often by obtaining or
amending their ship station license.
In Canada: Industry Canada is responsible for assigning MMSI
numbers to commercial and recreational vessels. Information is
available at the following web site: http://apollo.ic.gc.ca/english/
mmsi.html.
For information regarding MMSI’s visit:
http://www.navcen.uscg.gov/marcomms/gmdss/mmsi.htm.
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > NAVIGATION TERMS
Navigation Terms
Avg Speed—the average of all second-by-second speed readings
since last reset.
Bearing (BRG)—the compass direction from your current location
to a destination.
ETA at Destination—the time you estimate to reach a Go To
destination or the final waypoint in a route.
ETA at Next—the time you estimate to reach a Goto destination or
the next waypoint in a route.
Course—the course between the active from and to waypoints.
Fuel—the fuel required to travel from current location to the
indicated route waypoint.
Depth—the depth below transducer. This field is active only if a
transducer is connected to the GPSMAP 198C Sounder.
GPS Accuracy—estimated accuracy of the GPS location.
Leg Dist—the distance between two route waypoints.
Distance (Dist)—the distance from the current location to a
destination.
Leg Fuel—the fuel required to travel from a route waypoint to the
next waypoint (in sequence) in the route.
Dist to Destination—the distance from the current location to a Go
To destination, or the final waypoint in a route.
Leg Time—the time required to travel from a route waypoint to the
next waypoint (in sequence) in the route.
Dist to Next—the distance from current location to a Go To
destination, or the next waypoint in a route.
Max Speed—the maximum second-by-second speed recorded
since last reset.
DOP (Dilution of Precision)—reflects the quality of the GPS
signals and satellite geometry.
Moving Average Speed—average speed while the unit is moving.
Elevation—height above mean sea level (MSL).
ETA (Estimate Time of Arrival)—the time you estimate to reach
your destination waypoint, based on current speed and track.
GPSMAP 198C Sounder Owner’s Manual
Moving Trip Timer—total time the unit has been moving.
Odometer—a running tally of distance travelled, based on the
distance between second-by-second position readings.
Off Course—the distance you are off course in either direction,
left or right.
105
APPENDIX > NAVIGATION TERMS
Pointer—an arrow pointing to your destination.
Speed—the current velocity at which you are travelling, relative to
a ground position. Also referred to as ground speed.
Sunrise—the current day’s time of sunrise.
Total Average Speed—average speed of unit for both moving and
stopped speeds since last timer reset.
Total Trip Timer—total time the unit has been in operation since
last reset of the trip timers.
Time Of Day—the current time.
Turn—the angle difference between the bearing to your destination
and your current track. “L” indicates you should turn left; “R”
indicates you should turn right.
Time To—the estimated time required to reach a Goto destination,
or the next waypoint in a route. Also known as “estimated time en
route.”
VMG (Velocity Made Good)—the speed you are closing in on a
destination along a course. Also referred to as the vector velocity to
your destination.
Time to Dest—the estimated time required to reach a Goto
destination, or the final waypoint in a route.
Voltage—current voltage reading being received by unit.
Sunset—the current day’s time of sunset.
Time to Next—the estimated time required to reach a Goto
destination, or the next waypoint in a route.
Water Speed—the speed through the water. This field is only
active if the GPSMAP 198C Sounder is receiving speed readings
from a NMEA device.
To Course—the recommended direction to steer to reduce course
error or stay on course. Provides the most efficient heading to get
back to the course and proceed along your route.
Water Temp—the water temperature. This field is only active if
the GPSMAP 198C Sounder is receiving speed readings from a
NMEA device.
Track—the direction of movement relative to a ground position.
Also referred to as “ground track.”
Waypoint Destination—the final waypoint in the route, or the
destination waypoint.
Trip Odometer—a running tally of distance travelled since last
reset. See also “Odometer.”
Waypoint Next—the next waypoint in the route.
106
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > MESSAGES
Messages
No Diff GPS Location—RTCM is selected but no DGPS data is
being received.
Arriving at Destination—you are nearing your destination.
No Tide Stations for that Area—no tide stations within 100 miles
of the area.
Approaching Turn—you are nearing a turn in a route.
Batteries Low—you have less than 10 minutes of battery left.
Can’t Unlock Maps—no applicable unlock code for one or more
maps was found.
Cannot display all found, use city or postal code—the unit found
too many items to show. Narrow the search using the city or postal
code.
None Found—no data matched the search criteria.
Off Course—you are off course the distance set in the “Off
Course” alarm.
Proximity Memory Full—no additional proximity waypoints can
be saved.
Database Error—internal problem with the unit. Contact your
dealer or Garmin Product Support to have the unit repaired.
Proximity Radius Overlaps—the radii of two proximity
waypoints overlap.
Deep Water—the water is deeper than the amount set in the Deep
Water Alarm.
Route Already Exists—you have entered a route name that
already exists.
Dragging Anchor—the distance set in the Anchor Alarm is
exceeded.
Route Memory Full—no additional routes can be saved.
Lost Satellite Reception—the unit is unable to continue receiving
satellite signals.
Memory Full—unit memory is full; no further data can be saved.
Near Proximity Point—you are nearing a proximity waypoint.
GPSMAP 198C Sounder Owner’s Manual
Route Truncated—uploaded route from another device has more
than 50 waypoints.
Route Waypoint Memory Full—no additional route waypoints
can be saved.
Shallow Water—the water is shallower than the depth set in the
Shallow Water Alarm.
107
APPENDIX > MESSAGES
Track Already Exists—a saved track with the same name already
exists.
Track Truncated—a complete uploaded track does not fit in
memory. The oldest track log points have been deleted.
Track Memory Full—no more track data can be stored without
deleting old data.
Transfer Complete—data transfer has been completed.
Track Log Full—the track log is full and track recording has been
turned off. To record more track points, you need to clear the track
log and turn track recording on. This only appears when the track
recording setting is set to “Stop When Full.”
108
Waypoint Already Exists—a waypoint with the same name
already exists.
Waypoint Memory Full—the unit has stored the maximum
number of waypoints.
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > LORAN TD SYSTEM
LORAN TD System
LORAN C is a radio navigation aid operated and maintained in the
United States by the United States Coast Guard. The name LORAN
is an acronym for “LOng RAnge Navigation.” The LORAN system
covers the entire United States and the U.S. Coastal Confluence
Zone. From the perspective of a mariner, the system is used for
ocean and coastal navigation. It can be used as a supplemental
system for harbor and harbor approach navigation, and it is used
for inland navigation by recreational vehicles.
LORAN TD Feature
The LORAN TD (Time Delay) feature eases the transition from
using LORAN to using GPS. The GPSMAP unit automatically
converts GPS coordinates to LORAN TDs for those who have a
collection of LORAN fixes for favorite fishing spots and other
waypoints recorded as TDs. You can show your position as a TD
or enter waypoints as TDs. The accuracy to be expected from this
conversion is approximately 30 meters. When the unit is placed
in the LORAN TD format mode, it simulates the operation of
a LORAN receiver. Position coordinates can show as TDs, and
all navigation functions can be used as if the unit was actually
receiving LORAN signals.
Using the LORAN TD Format
Change to Loran TD from the Units
tab on the Main Menu.
GPSMAP 198C Sounder Owner’s Manual
When creating new waypoints using LORAN TD coordinates,
you must set the correct LORAN chain number and secondary
stations in the Setup TD field before storing the waypoint. After
the waypoint is stored in unit memory, it always references the
LORAN chain number and secondary stations currently selected in
the Setup TD field. If you enter a different LORAN chain number
or change the secondary stations or offsets in the Setup TD field,
the active waypoint information reflects those changes. Since the
GPSMAP 198C Sounder does not rely on the LORAN signal for
navigation, it can reference a different GRI chain and/or secondary
stations and still navigate to the location stored in memory.
109
APPENDIX > LORAN TD SYSTEM
The LORAN Position Format field is located under the Setup–
Location tab in the Main Menu. The LORAN TD Setup window
contains the fields to select the Loran GRI-Chain Number, Primary
and Secondary Stations, and TD Offsets.
To set up Loran TD from the Main Menu:
1. Press MENU twice to show the Main Menu.
2. Using the ROCKER, highlight the Position Format field on
the Units tab, and press ENTER.
3. Highlight Loran TD, and press ENTER.
4. Highlight Setup, and press ENTER.
5. To change the settings of any of the five fields, highlight the
field, press ENTER, select or enter a setting, then press
ENTER.
6. When finished, highlight Save, and press ENTER.
If the active GRI Chain, secondary stations, or offsets have been
changed since the waypoint was created, the waypoint now
references the active GRI-chain and secondary stations. You must
adjust the TD coordinates accordingly. Remember that the GPS
is not relying on the LORAN signal for navigation and actually
converts the TD coordinate to a useful LAT/LON coordinate before
storing the waypoint to memory or using it for navigation. Because
of this, the unit can navigate to a TD coordinate anywhere in the
world.
You must know your GRI chain number and secondary stations
to create a LORAN TD position. For more information, read our
LORAN TD Position Format Handbook, available at the Garmin
Web site (www.garmin.com/support/userManual.jsp.)
Loran TD Setup Page
110
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > OPTIONAL ACCESSORIES
Optional Accessories
The following optional accessories are designed to enhance the
operation of the GPSMAP 198C Sounder.
To obtain replacement parts and optional accessories, contact your
Garmin Dealer, Garmin Product Support in the U.S.A. at
800-800-1020, or Garmin Europe at 44-0870-8501241.
WARNING: Garmin accessories have been designed
and specifically tested for use with Garmin products.
Accessories offered by other manufacturers have not been
tested or approved for use with Garmin products. Use of
such accessories could cause damage to the GPSMAP 198C
Sounder and void the warranty.
MapSource Software CD-ROMs—enhances the basemap,
create waypoints and routes from your PC. MapSource offers
several detailed mapping options that are compatible with the
GPSMAP 198C Sounder, including MetroGuide, BlueChart, and
Fishing Hot Spots.
GPSMAP 198C Sounder Owner’s Manual
Programmable Data Cards—blank data cards are available in
8 MB, 16 MB, 32 MB, 64 MB, and 128 MB sizes. Download
street-level map detail, points of interest, business addresses and
phone numbers, marine data, topographical information, and more
from MapSource CD-ROMs to a data card, either directly through
your GPSMAP 198C Sounder using the PC Interface Cable, or
with the Data Card Programmer.
USB Data Card Programmer—programs blank data cards at high
speed through a PC.
Pre-Programmed Data Cards—data cards pre-programmed with
either Garmin BlueChart or Fishing Hot Spots map data.
A/C Adapter—powers the unit using a standard AC house current.
PC Interface Cable with vehicle Power Adapter—connects
the GPSMAP 198C Sounder to a vehicle’s electrical system on
one end, and a PC, beacon receiver, marine autopilot, or other
compatible device on the other end.
111
APPENDIX > SOFTWARE LICENSE AGREEMENT AND PRODUCT REGISTRATION
Software License Agreement
Product Registration
Garmin grants you a limited license to use the software embedded
in this device (the “Software”) in binary executable form in the
normal operation of the product. Title, ownership rights, and
intellectual property rights in and to the Software remain in
Garmin.
Use this area to record the serial number (8-digit number located
on the back of the box) in case your GPSMAP 198C Sounder unit
is lost, stolen, or needs service. Be sure to keep your original sales
receipt in a safe place or attach a photocopy inside the manual.
BY USING THE GPSMAP 198C SOUNDER, YOU AGREE TO
BE BOUND BY THE TERMS AND CONDITIONS OF THE
FOLLOWING SOFTWARE LICENSE AGREEMENT. PLEASE
READ THIS AGREEMENT CAREFULLY.
You acknowledge that the Software is the property of Garmin and
is protected under the United States of America copyright laws
and international copyright treaties. You further acknowledge
that the structure, organization, and code of the Software are
valuable trade secrets of Garmin and that the Software in source
code form remains a valuable trade secret of Garmin. You agree
not to decompile, disassemble, modify, reverse assemble, reverse
engineer, or reduce to human readable form the Software or any
part thereof or create any derivative works based on the Software.
You agree not to export or re-export the Software to any country
in violation of the export control laws of the United States of
America.
112
Help us better support you by completing our online registration
today! Have the serial number of your GPSMAP 198C Sounder
handy and connect to our Web site (http://www.garmin.com). Look
for the Product Registration link on our Home Page.
Serial Number: ___ ___ ___ ___ ___ ___ ___ ___
Contact Garmin
If you should encounter any difficulty while using your
GPSMAP 198C Sounder, or if you have any questions, in the
U.S.A. contact Garmin Product Support by phone: 913-397-8200
or 800-800-1020, Monday–Friday, 8 AM–5 PM Central Time, or
by e-mail at sales@garmin.com.
In Europe, contact Garmin (Europe) Ltd. at 44-0870.8501241.
GPSMAP 198C Sounder Owner’s Manual
APPENDIX > LIMITED WARRANTY
Limited Warranty
This Garmin product is warranted to be free from defects in materials or
workmanship for one year from the date of purchase. Within this period, Garmin
will at its sole option repair or replace any components that fail in normal use.
Such repairs or replacement will be made at no charge to the customer for parts
or labor, provided that the customer shall be responsible for any transportation
cost. This warranty does not cover failures due to abuse, misuse, accident or
unauthorized alteration or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE
EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES EXPRESS
OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY ARISING
UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY
GIVES YOU SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE
TO STATE.
IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL,
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER
RESULTING FROM THE USE, MISUSE, OR INABILITY TO USE THIS
PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not allow
the exclusion of incidental or consequential damages, so the above limitations
may not apply to you.
Garmin retains the exclusive right to repair or replace the unit or software or
offer a full refund of the purchase price at its sole discretion. SUCH REMEDY
SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH
OF WARRANTY.
To obtain warranty service, contact your local Garmin authorized dealer or call
Garmin Product Support for shipping instructions and an RMA tracking number.
The unit should be securely packed with the tracking number clearly written on
GPSMAP 198C Sounder Owner’s Manual
the outside of the package. The unit should then be sent, freight charges prepaid,
to any Garmin warranty service station. A copy of the original sales receipt is
required as the proof of purchase for warranty repairs.
Garmin International, Inc.
1200 E 151st Street, Olathe, Kansas 66062 U.S.A.
Tel. 913/397.8200
Fax. 913/397.8282
Garmin (Europe) Ltd.
Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL U.K.
Tel. 44/0870.8501241
Fax 44/0870.8501251
Online Auction Purchases: Products sold through online auctions are not eligible
for rebates or other special offers from Garmin. Online auction confirmations are
not accepted for warranty verification. To obtain warranty service, an original
or copy of the sales receipt from the original retailer is required. Garmin will
not replace missing components from any package purchased through an online
auction.
International Purchases: A separate warranty is provided by international
distributors for units purchased outside the United States. This warranty is
provided by the local in-country distributor and this distributor provides local
service for your unit. Distributor warranties are only valid in the area of intended
distribution. Units purchased in the United States or Canada must be returned to
the Garmin service center in the United Kingdom, the United States, Canada, or
Taiwan for service.
The Garmin GPSMAP 198 Sounder has no user-serviceable parts. Should you
ever encounter a problem with your unit, please take it to an authorized Garmin
dealer for repairs.
113
APPENDIX > FCC COMPLIANCE
FCC Compliance
The GPSMAP 198C Sounder complies with Part 15 of the FCC
interference limits for Class B digital devices FOR HOME
OR OFFICE USE. These limits are designed to provide more
reasonable protection against harmful interference in a residential
installation, and are more stringent than “outdoor” requirements.
Operation of this device is subject to the following conditions: (1)
This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that
may cause undesired operation.
This equipment generates, uses, and can radiate radio
frequency energy and may cause harmful interference to radio
communications if not installed and used in accordance with the
instructions. However, there is no guarantee that interference will
not occur in a particular installation.
114
If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the
receiver.
• Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician
for help.
The GPSMAP 198C Sounder does not contain any user-serviceable
parts. Repairs should only be made by an authorized Garmin
service center. Unauthorized repairs or modifications could result in
permanent damage to the equipment, and void your warranty and
your authority to operate this device under Part 15 regulations.
GPSMAP 198C Sounder Owner’s Manual
INDEX
INDEX
Symbols
2D Differential 42
2D GPS Location 89, 102
3D Differential 42
3D GPS Location 102
A
Accessories 111
Accuracy 39
Accuracy Alarm 76
Accuracy Circle 67
Active Route Page 37
Options 38
Alarms
Accuracy 76
Anchor Drag 76
Arrival 76
Battery 76
Clock 76
DGPS 76
DSC 25
Fish 76
Off Course 76
Shallow/Deep Water 76
Temperature 76
Alarm Tab 76
Anchor Drag Alarm 76
Arrival Alarm 76
B
Backlight 4
Base Map 64
Battery Alarm 76
Bearing Line 67
Bottom Split 81
C
Card Tab 62
Celestial Tab 47
Cleaning 98
Clock Alarm 76
Color Mode 64
Communication Tab 72
Correction Signals 103
Course Line 67
Course Up 64
D
Data Cards 101
Data Entry 6
Data Fields
Change Numbers 31
Show 31
Split Fields 35
Date/Time 102
Daylight Saving Time 62
GPSMAP 198C Sounder Owner’s Manual
Delete
DSC Directory Item 24
Depth Line 82
DGPS 103
Alarm 76
Differential GPS 103
Dilution of Precision 105
Distance 60
Distress Calls 22, 22–25
DOP 105
DSC 22
Call List 24
Directory 24
Log 24
Setting Up 25
DSC Tab 61
E
Edit
Route 56
Waypoint 11
Enter/Mark Key 5, 8
F
FCC Compliance 114
Features 5
Find 19
Additional Information 21
Find Key 5, 19
Fish Alarm 76
Flasher 86
G
Gain 81
Garmin Data Transfer 72
Go To 13
Distress Call 25
Position Report 25
GPS Tab 39
Options 43
H
Heading Line 67
Highway Page 35
Options 36
Setup 37
Highway Tab 68
I
Initializing 1
Installation 93
Interface Keys 5
Interfacing 100
In Zoom Key 5
K
Keel Offset 87
Keypad Usage 5
Key Beeps 69
115
INDEX
L
Language 69
License Agreement 112
LORAN TD 109
M
Magnetic Variation 71
Main Menu 39
Main Pages 26
Man OverBoard 10
MapSource 62
Map Datum 70
Map Detail 64
Map Information Page 65
Map Page 27
Options 30
Setup Map 33
Map Pointer 7, 28
Map Scales 29
Map Tab 64
Maritime Mobile Service Identity 104
Mark Key 5
Measure Distance 32
Menu Key 5
Merge From Card 62
Messages 107
MMSI 22, 104
MOB 10
MOB Key 5
116
N
NAV/MOB Key 5, 12
Navaids 66
Navigating 12
Distress Call 25
Go To 13
Position Report 25
Routes 53
TracBack 14
Navigation Terms 105
NMEA 74
Noise Reject 82
North Up 64
Numbers Page 34
O
Off Course Alarm 76
Orientation 64
Out Zoom Key 5
Overzoom 29
P
Pages Tab 63
Page Key 5
Pointer Page 33
Options 34
Points Tab 48
Position Format 70
Position Reports 23
Power Key 5
Power On/Off 1
Proximity Waypoints 52
Q
Quit Key 5
R
Receiving a DSC Call 25
Replace From Card 62
Review
DSC Call 23
Waypoints 11
Rocker Key 5
Routes 17
Copy 53
Create 17
Delete 53
Delete All 53
Edit 56
Routes Tab 53
Route Review Page 54
Options 55
RTCM 74
S
Satellite Location 102
Satellite Sky View 102
Selecting Options 6
Shallow/Deep Water Alarm 76
Simulator Mode 3
Software Update Card 69
Sonar 78
Depth Line 82
Gain 81
Noise Reject 82
Understanding 89
View/Span 81
Whiteline 82
Sonar Page 78
Adjustment Menu 79
Bottom Split 81
Options 83
Sonar Tab 68
Options 85
Specifications 92
Speed Filter 69
Spot Sounding 66
Storage 98
System Information 69
System Tab 69
T
Temperature Scale 68
Temperature Tab 68
Thermoclines 91
Tide Stations 43
Tide Tab 43
Time Format 62
Time Tab 62
Time Zone 62
GPSMAP 198C Sounder Owner’s Manual
INDEX
TracBack 14
Activate 16
Track Logs
Clear 15
Save 15
Track Tab 59
Active 59
Saved 59
Track Up 64
Transducer 90, 96
Trip Planning 58
Trip Tab 46
U
Underwater Waypoints 84
Units Tab 70
Unit Defaults 69
W
WAAS 40, 103
Disable/Enable 41
Waterproof 98
Water Speed 87
Water Temperature Alarm 76
Waypoints
Creating 8
Creating Graphically 9
Editing 11
Enter/Mark 8
Move 12
Proximity 52
Reviewing 11
Underwater 84
Waypoint Lists
Proximity 51
User 49
Whiteline 82, 91
Wide Area Augmentation System 40,
103
Wiring Installation 99
Z
Zoom Keys 5
Zoom Range 29
Zoom Settings 29
GPSMAP 198C Sounder Owner’s Manual
117
For the latest free software updates (excluding map data) throughout the life of your
Garmin products, visit the Garmin Web site at www.garmin.com.
© Copyright 2005 Garmin Ltd. or its subsidiaries
Garmin International, Inc.
1200 East 151st Street, Olathe, Kansas 66062, U.S.A.
Garmin (Europe) Ltd.
Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9DL, U.K.
Garmin Corporation
No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan
www.garmin.com
Part Number 190-00541-00 Rev. B
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