Garmin GPS 120XL GPS Receiver User Manual

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GPS 120XL
Marine
Navigator
ZOOM
Owner’s Manual
&
Reference
®
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Software Version 2.0 or above
© 1997 GARMIN Corporation
1200 E. 151st Street, Olathe, KS USA 66062
Tel: 913-397-8200 or 800-800-1020
Fax: 913-397-8282
Web Site Address: www.garmin.com
GARMIN (Europe) Ltd.
Unit 5,
The Quadrangle, Abbey Park Industrial Estate,
Romsey, SO51 9AQ, U.K.
Tel: 011-44-1794-519944
Fax: 011-44-1794-519222
GARMIN (Asia) Corp.
4th Fl., No. 1., Lane 45,
Pao-Hsing Road,
Hsin Tein,
Taiwan R.O.C.
Phone: 886.02.917.3773
Fax: 886.02.917.1758
All rights reserved. No part of this manual may be reproduced or transmitted in any
form or by any means, electronic or manual, including photocopying and recording, for
any purpose without the express written permission of GARMIN.
Information in this document is subject to change without notice. GARMIN reserves
the right to change or improve its products and to make changes in the content without
obligation to notify any person or organization of such changes or improvements.
GARMIN, Personal Navigator, AutoLocate,TracBack, and MultiTrac 8 are all trademarks of GARMIN Corporation and may not be used without the expressed permission
of GARMIN.
July 1997 - Part #190-00136-00 Rev. B - Printed in Taiwan.
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INTRODUCTION
GPS 120XL
OPERATOR’S
MANUAL
Overview
Welcome to the easiest-to-use fixed-mount GPS on the water!
The GPS 120XL represents GARMIN’s continuing commitment to provide
mariners with quality navigation information in a versatile, accurate and userfriendly design which will be useful for years to come. To get the most from
your new GPS unit, it is important that you take the time to read through the
operator’s manual to understand the operating features of the GPS 120XL.
The manual is organized into four sections for your convenience:
Introduction gives a quick overview of the manual and contains the
table of contents and glossary of navigation terms.
Getting Started takes you through step-by-step instructions to initialize
the receiver for first-time use and introduces you to the basic features of the
unit with a quick-start orientation to the GPS 120XL. This section has been
designed to acquaint you with the unit and provide a basic working knowledge necessary to use the unit in typical conditions.
Reference provides detailed explanations of the advanced features and
operations of the GPS 120XL in a topical format. This allows you to concentrate on a specific topic quickly, without reading through entire sections of
text that you may not need.
The Appendix section contains installation instructions and items with
multiple listings, such as: map datams, time offsets, and the index.
Packing List
Before getting started with your GPS receiver, check to see that your
GARMIN GPS 120XL package contains the following items. If you are missing any parts, please contact your dealer immediately.
Standard Package:
• GPS 120XL Unit
• Mounting Bracket with knobs
• External Antenna with 30’ cable
• Owner’s Manual
• Power/Data Cable
• Quick Reference Card
See your GARMIN dealer for accessories, including our PC kit.
Thanks for choosing the GARMIN GPS 120XL. We hope it will help you
meet all of your navigation needs.
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INTRODUCTION
Caution
The GPS system is operated by the government of the United States,
which is solely responsible for its accuracy and maintenance. The system is
subject to changes which could affect the accuracy and performance of all
GPS equipment. Although the GPS 120XL is a precision electronic
NAVigation AID (NAVAID), any NAVAID can be misused or misinterpreted
and, therefore, become unsafe.
Use the GPS 120XL at your own risk. To reduce the risk of unsafe
operation, carefully review and understand all aspects of this Operator’s
Manual and thoroughly practice operation using the simulator mode prior to
actual use. When in actual use, carefully compare indications from the GPS
120XL to all available navigation sources including the information from
other NAVAIDs, visual sightings, maps, etc. For safety, always resolve any discrepancies before continuing navigation.
NOTE: This device meets requirements for Part 15 of the FCC limits for
Class B digital devices for home or office use. It has been tested for compliance with all necessary FCC standards. This equipment generates, uses, and
can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
other equipment, which can be determined by turning the equipment off and
on, the user is encouraged to try and correct the interference by relocating the
equipment or connecting the equipment to a different circuit than the affected
equipment. Consult an authorized dealer or other qualified service technician
for additional help if these remedies do not correct the problem. Operation is
subject to the following conditions: (1) This device cannot cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation. The GPS 120XL
does not contain any user-serviceable parts. Repairs should only be made by
an authorized service center. Unauthorized repairs or modifications could
void your warranty and your authority to operate this device under Part 15
regulations.
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Page 1
INTRODUCTION
Table of
Contents
SECTION ONE Introduction
Glossary/Navigation Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4
SECTION TWO Getting Started
Turning On and Initializing the Receiver . . . . . . . . . . . . . . . . . . . . . .5-7
Primary Page Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-9
Marking a Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-11
Position and Map Page Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12
Going To a Waypoint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Using the Highway Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Cancelling a GOTO and Clearing Maps . . . . . . . . . . . . . . . . . . . . . . .15
SECTION THREE Reference
Satellite Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-17
Position Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Marking, Saving, and Using Waypoints . . . . . . . . . . . . . . . . . . . . .19-26
TracBack Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27-28
Creating and Using Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29-34
Using the Compass and Highway Navigation Pages . . . . . . . . . . . .35-37
Map Plotting, Zooming, and Cursor Movement . . . . . . . . . . . . . . .38-40
Menu Page and Distance/Sun Calculation . . . . . . . . . . . . . . . . . . . . . .41
Track Log Setup and TracBack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Interface Setup and DGPS Interface . . . . . . . . . . . . . . . . . . . . . . . .43-45
System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46-47
Navigation Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48-50
Map Page Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51-52
Alarms Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Navigation Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Appendix A––Unit and Antenna Installation . . . . . . . . . . . . . . . . .55-57
Appendix B—Specifications and Wiring . . . . . . . . . . . . . . . . . . . .58-59
Appendix C—Messages/Time Offsets . . . . . . . . . . . . . . . . . . . . . . .60-61
Appendix D—Map Datums . . . . . . . . . . . . . . . . . . . . . . . . . . . . .62-64
Appendix E—Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .65-66
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Page 2
INTRODUCTION
Glossary
The GPS 120XL is a powerful navigation tool that can guide you anywhere
in the world. To better understand its operation and capabilities, it may be
helpful to review the basic terms and concepts briefly explained below.
Other navigation and GPS definitions used in the manual are defined in the
appropriate reference sections of the manual.
Almanac Data
Satellite constellation information (including location and health of satellites)
that is transmitted to your receiver from every GPS satellite. Almanac data must
be acquired before GPS navigation can begin.
Bearing
The compass direction from your position to a destination.
Course Made Good (CMG)
The bearing from the “active from” position (your starting point) to your
present position.
Crosstrack Error (XTE)
The distance you are off a desired course in either direction.
Desired Track (DTK)
The compass course between the “from” and “to” waypoints.
Differential GPS (DGPS)
An extension of the GPS system that uses land-based radio beacons to transmit position corrections to GPS receivers.
Estimated Time of Arrival (ETA)
The time of day of your arrival at a destination.
Estimated Time Enroute (ETE)
The time left to your destination at your present speed.
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INTRODUCTION
Glossary
Grid
Coordinate system that projects the earth on a flat surface, using square
zones for position measurements. UTM/UPS and Maidenhead formats are
grid systems.
Ground Speed
The velocity you are traveling relative to a ground position.
Latitude
The north/south measurement of position perpendicular to the earth’s
polar axis.
Longitude
An east/west measurement of position in relation to the Prime Meridian,
an imaginary circle that passes through the north and south poles.
Navigation
The process of traveling from one place to another and knowing where
you are in relation to your desired course.
Position
An exact, unique location based on a geographic coordinate system.
Track (TRK)
The direction of movement relative to a ground position.
Universal Transverse Mercator (UTM)
A grid coordinate system that projects global sections onto a flat surface to
measure position in specific zones.
Velocity Made Good (VMG)
The speed you are traveling in the direction of the destination.
Waypoint
A specific location saved in the receiver’s memory.
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INTRODUCTION
Navigation
Basics
The GPS 120XL provides steering guidance and navigation information using degrees, a measurement measured
in a clockwise direction from a north reference. North is
described as 000º, east as 090º, south as 180º, and west as
270º. The diagram and compass rose below provide a graphic
illustration of the navigation terms used by the GPS 120XL.
More information on basic navigation and GPS are available
at your local library or bookstore.
“A
CT
IV
E
NORTH
NORTH
DIST
LE
G”
ANC
E
“ACTIVE TO”
WAYPOINT
CK
RA
ST
OS
CR
“ACTIVE FROM”
WAYPOINT
4
R
RO
ER
DTK
TRK
GR
OU
ND
SP
EE
D
BRG
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Getting Started with your GPS
Welcome to the exciting world of GARMIN GPS!
The GPS 120XL represents GARMIN’s continuing commitment to provide marine users with quality navigation information in a versatile, user-friendly design they
will enjoy for years to come. To get the most out of
your GPS receiver, be sure to read through the initialization and Getting Started sections of this manual, and
refer to the reference section for complete details on
the GPS 120XL’s advanced features.
GETTING
STARTED
Initialization
Initializing Your GPS for First-Time Use
The first time you power up your new GPS 120XL
is an important step in getting the best possible future
GPS performance.
Because a GPS receiver can only receive signals
from satellites above the horizon, it needs to know
what satellites to look for at any given time. By using
an almanac (a timetable of satellite numbers and their
orbits) stored in the receiver’s memory, the GPS 120XL
can determine the distance and position of any GPS
satellite and then use this information to determine
your position.
Welcome Page
The welcome page will
appear as soon as the GPS
120XL is turned on and
remain while the unit conducts a brief self-test.
To obtain this almanac data, your GPS receiver
needs to be initialized -- or given the opportunity to
“find itself”-- the very first time it is turned on. Once
you have initialized the unit, the GPS 120XL will compute future fixes more rapidly, usually in a few
minutes.
Remember that initializing the unit is only necessary under the following conditions:
• First-time use from the factory
• If the receiver has been moved over 500 miles
from the last calculated position with power off
• If the receiver’s memory has been cleared and all
stored data has been lost
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GETTING
STARTED
Initialization
Page 6
Initializing the Receiver
The receiver is shipped from the factory in
AutoLocate™ mode, which enables the GPS 120XL to
determine its location anywhere in the world. To speed
up the initialization process, we recommend using the
graphic initialization described below, which will usually provide a fix in 7.5 to 15 minutes.
Before you initialize, make sure your GPS 120XL
unit and antenna have been correctly installed on your
boat according to the instructions in Appendix A.
To turn the GPS 120XL on:
1. Press and hold P until the receiver turns on.
The welcome page will be displayed while the unit
conducts a self test.
The EZinit prompt will
automatically appear if the
receiver needs to be initialized. The prompt may also
appear during normal use if
the antenna is shaded.
Once testing is complete, the welcome page will be
replaced by the Satellite Page, with the EZinit prompt
ready for you to select one of two initialization
methods:
•Select Country––allows you to initialize the
receiver by selecting your present position from a
list of countries in the GPS 120XL’s internal database. This usually provides a position fix in a few
minutes.
•AutolocateTM ––allows the GPS 120XL to initialize
itself and calculate a position fix without knowing
your present position. This usually provides a position fix in 7.5-15 minutes.
If the EZinit prompt has not automatically
appeared on the Satellite Page:
1. Press the F key.
Use the arrow keypad to
highlight the country,
region or state of your present position from the list
and press ENTER. If the
country is not listed, select
the closest country instead.
Note: If the EZinit prompt ever appears after you
have initialized the receiver (due to the antenna’s view
of satellites being obstructed by trees, etc.), highlight
the ‘no re-init’ selection with the arrow keypad and
press ENTER.
To initialize the receiver:
1. If the ‘country’ option is not highlighted, press theD
key repeatedly to move the field highlight to the ‘country’ option.
6
2. Press the F key.
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Page 7
Initializing the Receiver (cont)
3. Use the D key to scroll through the list options until
the country of your present position appears.
4. Use theU key to highlight the country/state/region
you’re in. If the country you’re in is not listed, select
another country within 500 miles of your present
position.
GETTING
STARTED
Initialization
5. Press F to finish.
The GPS 120XL will now begin searching for the
appropriate satellites for your location and should
acquire a position within 3-5 minutes. You can verify
that you have acquired a position by watching the
Satellite Page transition to the Position Page (provided
you haven’t pressed any other buttons) or by looking for
a ‘2D NAV’ or ‘3D NAV’ status at the top left corner of
the Satellite Page.
Initialization Troubleshooting
If you have trouble initializing the receiver or
acquiring a position, check the following:
• Does the antenna have a clear view of the sky?
If there are large buildings or mountains nearby, or
if there is heavy tree cover, the receiver may not be
receiving enough satellite signals to calculate a
position.
• Have you selected the right country/state/region
from the EZinit list?
Check for the correct approximate lat/lon on the
Position Page, or reselect the appropriate country
from the list to restart the initialization.
• Have you moved more than 500 miles from the
last calculated position with the receiver off?
The GPS 120XL’s Satellite
Page will help you determine which satellites are in
view and whether or not
any satellites are being
“shaded” or blocked from
the receiver’s antenna.
By monitoring the signal
strength bars at the bottom
of the page and the sky view,
you’ll be able to see how
moving to another area with
a clearer view of the sky will
improve satellite reception
and speed up signal
acquisition.
Reinitialize the receiver, selecting the country/state/
region of your new location from the EZinit list.
Your unit should now be initialized. If you want to
complete the Getting Started Tour at another time, you
may now turn the GPS 120XL off (see below) or you
may continue.
To turn the GPS 120XL off:
1. Press and hold P for approximately three seconds
until the receiver turns off.
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GETTING
STARTED
Primary Pages
Page 8
Primary Pages
Before we start the tour, let’s briefly look at the five
primary information pages used for the GPS 120XL.
Note: Switch between pages by pressing either the Q
or Jkeys.
J
Q
Satellite Page
The Satellite Page shows satellite positions and
signal strength. Satellite positions are displayed using
two circles and a center point. The outer circle shows
satellites on level with the horizon; the inner circle is
45º above the horizon; and the center point represents
satellites directly overhead. Knowing satellite positions
will show you the direction of any blocked signals.
Satellite Page
The Satellite Page will
allow you to monitor satellite signal reception and
strength.
The bottom of the page contains a row of signal
strength bars corresponding to each satellite being used.
Position Page
The Position Page shows you where you are, what
direction you’re heading and how fast you’re going.
The top of the page contains a compass tape which
is a graphic representation of your heading. Your track
and speed are indicated immediately below.
#
!
Position Page
8
The graphic compass tape reflects your heading only while you are moving.
The rest of the page shows your current position in
three dimensions: latitude, longitude and altitude. A
trip odometer and 12/24 hour clock are also provided.
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Map Page
The Map Page acts as a window. It allows you to
view your position, the “path” you have traveled over,
and nearby waypoints.
GETTING
STARTED
Map, Navigation
& Menu Pages
A diamond icon in the center of the screen represents your current position. As you move, you will see
a thin line-- called a track log-- appear along the path
you have just covered. Names of stored waypoints can
also be shown on the map.
The bottom corners of the screen will always display your current track and speed. When going to a
waypoint, highlighting an on-screen waypoint, or using
the panning target crosshair, the corresponding distance and bearing are shown at the top corners of the
screen.
Navigation Page
A navigation page gives you steering guidance
when going to a waypoint. The GPS 120XL has two
navigation page choices: the Highway Page and the
Compass Page. The Highway Page is the default and
will be briefly explained here. The Compass Page is
covered on pages 35 and 37.
The Highway Page uses a graphic highway to
show your movement in relation to your desired
course. The upper section shows bearing and distance
to the waypoint and your current track and speed. The
middle portion contains the actual highway. The highway indicates the crosstrack error, or distance and
direction, your are off-course from your waypoint.
Always turn in the direction the highway is pointing.
For example, if the highway points straight up, no turn
is required. If the highway points right, you need to
turn right until the highway points straight up. The
remainder of the page contains the estimated time
enroute (ETE) and your velocity made good (VMG).
Menu Page
The last primary page is the Menu Page. The
Menu Page gives you access to the GPS 120XL’s waypoint management, route, track log, and setup features
through a list of submenus.
Map Page
Shows your progress on a
moving track plotter and
get a bird’s-eye-view of surrounding waypoints with
the Map Page.
Highway Page
With the Highway Page,
you will get graphic steering guidance in navigating
a route or to a single waypoint.
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GETTING
STARTED
Marking A
Position
Page 10
Getting Started Tour
Now that your GPS receiver has been initialized and
you are familiar with the primary pages, it’s time to take
a tour. This is a live tour and is to be conducted with
your unit installed and with the boat in the water. The
tour will take you through the receiver’s basic features
and functions as you move about on the water and
assumes that the GPS 120XL is turned on, initialized,
and that you have not changed any of the factory settings (units of measure, selectable fields, etc.). If these
settings have been changed, the pictures and descriptions in this manual may not match what you see on
your screen.
Navigation Simulator
The simulator mode will
allow you to practice navigation and become familiar
with the GPS 120XL without leaving your slip.
If you are not able to take the Getting Started Tour
with your boat in the water, you may use the built-in
navigation simulator to practice using the GPS 120XL.
To use the simulator, see page 54.
Marking a Waypoint
To begin the tour, let’s take the position you have
acquired (either by just initializing the unit or by having
turned the unit on) and mark it as a waypoint for future
reference.
1. Press the M key to capture and hold your position.
#
!
To save a waypoint with the
default three-digit name,
simply press the MARK key
followed by the ENTER key.
The GPS 120XL will then
return to the page previously displayed.
10
To mark a position, you must have obtained a
2D or 3D fix, or have the receiver in simulator
mode. If you try to mark a position without a
position fix, you will be alerted with a ‘No GPS
Position’ message.
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Page 11
The mark position page will appear, showing the
captured position and a default 3-digit waypoint name.
Let’s change the default name to something a little more
meaningful, like ‘DOCK’.
1. Press theU key twice to move the field highlight
from the ‘save’ field to the name field.
GETTING
STARTED
Marking A
Position
2. Press Fand L to clear the default waypoint
name.
3. Press and hold theU key to scroll through the
alphabet until the letter ‘D’ appears.
4. Press the R key once to move the character highlight
to the next character space.
5. Repeat steps 3 and 4 until the word ‘DOCK’ is displayed.
6. Press F to complete entry of the name.
7. Press the D key once to return the field highlight to
the ‘save’ field.
8. Press the F key to confirm that you want to save
the position as a waypoint named ‘DOCK’.
The mark position page will now be replaced by
the Position Page (or whatever page was displayed
prior to pressing the M key). The ‘DOCK’ waypoint
is now stored in the GPS 120XL’s memory, and will
remain there until you manually remove it or clear the
receiver’s memory. For more on waypoint management,
see pages 19-25.
The arrow keypad is used
for all data entry. Use the
UP and DOWN keys to
select letters, numbers, or
menu options, and use the
LEFT and RIGHT keys to
move the cursor forward or
backward along the line.
Using the Position and Map Pages
Now that you’ve marked a position, let’s see how
the Position and Map Pages can be used to monitor
your progress as you head out in to the open water.
#
!
Position Page
As always, ensure your primary focus is on
boating traffic and monitor the GPS120XL
briefly when operating your boat.
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GETTING
STARTED
Position & Map
Pages
Page 12
Using the Position and Map Pages (continued)
As you head out, the Position Page will help you
monitor your movement.
Track Over
Ground
Trip
Odometer
Graphic
Compass Tape
Current Speed
Altitude
Position
Display
12/24 Hour
Time
The Map Page displays
your present position as a
diamond icon and provides
real-time graphic “breadcrumb” display of your
track right on the screen.
The direction you are moving (your track) and your
speed are displayed on the upper part of the page, just
below the graphic compass tape. The latitude, longitude
and approximate altitude of your position, along with a
resettable trip odometer, are continuously displayed in
the middle of the page, and the time of day is displayed
below.
Now let’s change the display to the Map Page and
watch the track log of our tour:
1. Press the J key to change from the Position Page
to the Map Page.
To get a larger view of the Map Page, lets change the
the zoom scale from .2 (default) to 1.0 nautical mile.
To select a larger zoom scale on the Map Page:
1. Press the H key until ‘1.0 n.m. zoom scale’ appears.
The moving map’s default
screen orientation is track
up orientation. “Track up”
means that your current
direction of travel is always
up (or towards the top of)
the screen. It can also be set
for north up, or desired
track orientation through
the map setup page.
12
Your current position is shown as the diamond in
the middle of the screen. The dark circle below the diamond represents the position you created, with the line
between the two showing your track.
1. Once you have reached an area that allows for general changes in direction without interfering in the passage of other boats, mark your current position again
and name this waypoint “CHANNL”. (See ‘Marking a
Waypoint’ on pages 10-11)
2. Next, make a moderate turn in any direction safe for
navigation and proceed for another 3 minutes.
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Page 13
GETTING
STARTED
Going To a Waypoint
Once you’ve stored the “CHANNL” waypoint in
memory, you can use the GPS 120XL to guide you to it
by performing a simple GOTO. A GOTO is nothing
more than a straight-line course from your present
position to the destination you’ve selected.
#
!
Going To A
Waypoint
Use caution when navigating. A “straight-line”
course reflects the shortest distance to a waypoint,
and does not navigate around obstructions, such
as land or buoys, etc.
Now that you have moved away from ‘CHANNL’
for three minutes, let’s try navigating back to it.
To select a GOTO destination:
1. Press the G key.
2. The GOTO waypoint page will appear, displaying all
the waypoints in memory in alphabetical order.
3. Use U or D to highlight the ‘CHANNL’ waypoint.
The GOTO waypoint page
allows you to select your
destination from a list of all
available waypoints in the
GPS 120XL’s memory.
4. Press the F key to confirm that you want to navigate to the displayed waypoint. The Highway Page
(default) will appear.
Bearing to
Waypoint
Distance to
Waypoint
Destination Waypoint
Destination
Waypoint
“Finish Line”
CDI Scale
The GPS 120XL’s Highway Page provides graphic
steering guidance to a destination, with an emphasis on
a straight-line course to the desired waypoint and the
distance and direction you are off course. The bearing
and distance to a waypoint, along with your current
track and speed are displayed at the top of the screen,
with your estimated time enroute (ETE) and velocity
made good (VMG), or the speed you are approaching
your destination, shown at the bottom.
Once a GOTO is activated,
the GPS 120XL will provided steering guidance until
the GOTO is cancelled. To
cancel a GOTO, highlight
the cancel prompt at the
bottom of the page and
press ENTER.
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GETTING
STARTED
Using The
Highway Page
Page 14
Using the Highway Page (continued)
Current Track
Current Speed
Position
Diamond
Estimated
Time of
Arrival
Velocity Made
Good
Pointer to Waypoint
The 120XL will also provide
steering guidance with a
graphic compass page.
To change the display from
the highway page, press
ENTER twice.
As you head toward your destination, the middle
section of the screen provides visual guidance to your
waypoint on a moving graphic “highway”. The moving
arrow just below the course deviation scale always
points to your selected waypoint relative to the direction you are moving.
Your present position is represented by the diamond
in the center of the course deviation scale. The line
down the middle of the highway represents your
desired track. As you navigate toward a waypoint, the
highway will actually move, indicating the direction
you’re off course, relative to the position diamond on
the CDI scale. To stay on course, simply steer toward
the center of the highway.
While navigating, you may decide to use the
Compass Page (see picture above left) instead of the
Highway Page.
To select the Compass Page:
1. While viewing the Highway Page press F, twice.
Once you are one minute
from the destination (based
on your present speed and
course), an arrival message
will appear on the message
page.
The Compass Page will now become the displayed
navigation page. This page provides a directional pointer to your destination, by using a rotating compass display to show direction of travel. It provides better steering guidance at slower speeds for travel with many
directional changes.
To switch back to the Highway Page, press ENTER
twice.
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Page 15
Cancelling a GOTO
If you decide to stop navigating to the active waypoint, all you have to do is cancel the GOTO.
To cancel an active GOTO:
1. Press the G key.
GETTING
STARTED
Cancelling A
GOTO &
Clearing Maps
2. Use the arrow keypad to move the field highlight to
the ‘CANCEL GOTO?’ prompt at the bottom of the page
and press F.
Clearing a Cluttered Map Display
After you’ve used the GPS 120XL for a few trips,
you may find that your map display has become a bit
messy from keeping track of your every move. For
practice, let’s clean up the screen by clearing the track
log (the plot points left on the Map Page) we’ve just
created during the Getting Started Tour.
1. Press J or Q until the Menu Page appears.
2. Use theD key to move the field highlight to the
‘TRACK LOG’ option.
3. Press F to access the track log page.
4. Press the U key twice to highlight the ‘CLEAR LOG?’
option. The clear log confirmation page will appear.
Highlight the ‘CLEAR
LOG?’ prompt and press
ENTER to clear the track
log. Once all 1024 points
are used, the oldest point
will be continuously deleted
to make room for the latest
track log point.
5. Use the L key to highlight the ‘Yes’ prompt.
6. Press F to finish.
Turning the Receiver Off
You’ve now gone through the basic operation of
your new GPS receiver and probably know a little more
than you think about how it works. We encourage you
to experiment with the GPS 120XL until it becomes an
extension of your own navigation skills. If you
encounter any problems using the unit or want to take
advantage of the GPS 120XL’s more advanced features,
refer to the reference section.
Holding the POWER key
for three seconds ensures
against accidental shut-off
by accidentally pressing the
button.
To turn the GPS 120XL off:
1. Press and hold the P key for 3 seconds.
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REFERENCE
Satellite Page
Overview
Page 16
Satellite Page
Status
Satellite
Sky View
Satellite
Sky View
Satellite
Numbers
As soon as a satellite has
been found and the GPS
120XL is acquiring position
data, the satellite number
will turn to normal presentation and a hollow bar will
appear.
Satellites being tracked but
blocked from use (03,17)
will be displayed in reverse
video, with the corresponding signal strength bar hollow.
16
The Satellite Page displays the status of various
receiver functions. The status information will help you
understand what the GPS 120XL is doing at any given
time, and will tell you whether or not the receiver has
calculated a position fix.
Sky View and Signal Strength Bars
The sky view and signal strength bars give you an
indication of what satellites are visible to the receiver,
whether or not they are being used to calculate a position fix, and the signal quality. The sky view in the center of the page shows a bird’s-eye view of the position of
each satellite relative to the receiver’s last known position. The outer circle represents the horizon (north up);
the inner circle is 45º above the horizon; and the center
point is a position directly overhead.
When the receiver is looking for a particular satellite, the corresponding signal strength bar will be blank
and the sky view indicator will remain highlighted in
reverse video. Once the receiver has found the satellite,
a hollow signal strength bar will appear, indicating that
the satellite has been found and the receiver is collecting data from it. The satellite number in the sky view
will also change from reverse video to normal presentation. As soon as the GPS 120XL has collected the necessary data to use the satellite for positioning, the hollow
bar will become solid.
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Page 17
Receiver Status and EPE
Receiver status is indicated at the top left of the
screen, with the current horizontal accuracy (estimated
position error, in feet or meters) at the top right. The
status will show one of the following conditions:
REFERENCE
Receiver Status
& EZinit
Searching— the GPS 120XL is looking for any
available satellites in view.
AutoLocateTM— the GPS 120XL is initializing and
collecting new almanac data. This process can take
7.5 to 15 minutes.
Acquiring— the receiver is collecting data from
available satellites, but has not collected enough
data to calculate a 2D fix.
2D Nav (2D Navigation)— at least three satellites
with good geometry have been locked onto and a
2-dimensional position fix (latitude and longitude)
is being calculated. ‘2D Diff’ will appear when you
are receiving DGPS corrections in 2D mode.
3D Nav (3D Navigation)— at least four satellites
with good geometry have been locked onto, and
your position is now being calculated in latitude,
longitude and altitude. ‘3D Diff’ will appear when
you are receiving DGPS corrections in 3D mode.
A ‘POOR CVRG’ status
will appear on the Satellite
Page if the receiver has lost
the satellites required to
compute a fix. Make sure
the external antenna is not
covered and is connected to
the GPS 120XL.
Poor CVG (Poor GPS Coverage)— the receiver is
no longer tracking enough satellites for a 2D or 3D
fix.
Not Usable— the receiver is unusable, possibly
due to incorrect initialization or abnormal satellite
conditions. Turn the unit off and back on to reset.
SIM (Simulating Navigation)— the receiver is in
simulator mode.
EZinit Option Prompt
The Satellite Page also provides access to the GPS
120XL’s initialization menu, the EZinit prompt. The
EZinit prompt will appear automatically the first time
the unit is turned from the factory, after 10 minutes of
unsuccessful satellite acquisition, or if you push the
ENTER key while viewing the Satellite Page with the
unit in searching, AutoLocate, acquiring, simulator, or
poor coverage modes. (See pages 6-7 for more on
EZinit.)
If you travel more that 500
miles with the receiver off,
reinitialize the unit to your
new position by using the
EZinit feature. To access
EZinit, press ENTER from
the Satellite Page before any
satellites are acquired.
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REFERENCE
Backlighting &
Position Page
Page 18
Screen Backlighting
The GPS 120XL features three levels of backlighting.
Activate the backlight by pressing the POWER key
briefly. Each press of the button advances the backlighting to the next level and then turns it off. Backlighting
will remain on until turned off. Note: a bulb icon will
appear on the Satellite Page when backlighting is on.
Position Page
The speed and track displayed on the Position Page
may fluxuate at slow speeds
(or when you’re standing
still) because of position
errors caused by Selective
Availability.
The GPS 120XL’s Position Page shows you where
you are, the direction you are heading, and your speed,
and is most useful when you are traveling without an
active destination waypoint. A compass tape at the top
of the page displays your cardinal heading (while moving), with current track and speed over the ground indicated below. The rest of the page shows your present
position in three dimensions (latitude, longitude and
altitude). The units of measure for speed, distance, position and altitude are all user-selectable through the navigation setup menu (see pages 48-50). The 12/24 hour
clock and time offset options are available from the system setup menu (see page 47).
Trip Odometer
The Position Page also features a resettable trip
odometer to measure your total distance traveled.
To reset the trip odometer:
1. Press the D key until the trip field is highlighted.
2. Press F, followed by L.
3. Press F to finish.
Altitude Display
To reset the trip odometer,
highlight the trip field and
press ENTER. Use the
LEFT arrow key to clear the
distance field, and press
ENTER to confirm.
When the GPS 120XL is acquiring satellites or navigating in the 2D mode, the last known altitude will be
used to compute your position. If the altitude shown is
off by several hundred feet, you can manually enter
your altitude for greater accuracy. Note that GPS altitudes can fluxuate due to errors.
1. Press the D key until the altitude field is highlighted
and press F.
18
2. Use the arrow keypad to enter the altitude and press
F.
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Page 19
Marking and Saving Waypoints
Knowing your present position is only part of any
navigation equation. You also need to keep track of
where you’ve been and where you are going.
Waypoints serve as electronic markers that let you keep
track of starting points, destinations, navaids and any
other important position.
REFERENCE
Marking &
Saving
Waypoints
The GPS 120XL allows you to mark, store and use
up to 250 waypoints. A waypoint position can be
entered by taking an instant electronic fix or by manually entering a coordinate or range and bearing in reference to an existing waypoint. If you try to mark a waypoint without having a position fix, you’ll be notified
with a ‘No GPS Position’ message.
To mark your present position:
1. Press the M key to capture your position.
The mark position page will appear, showing the
captured position and a default 3-digit waypoint name.
To change the default position name:
1. Press the U key twice to move the field highlight
from the ‘save’ field to the name field.
2. Press F to begin entry of the name. Pressing the
L key will clear any existing data.
The GPS 120XL will automatically name new waypoints with a default threedigit name. You may then
highlight the name field,
press ENTER, and enter
your own waypoint name.
3. Use the arrow keypad to enter the name.
4. Press F to confirm the waypoint name. The field
highlight will move to the ‘route’ field.
If you’d like to add this waypoint to a route:
1. Press the F key.
2. Use the U or D keys to enter a route number
and press F.
3. Press the F key again to save the waypoint.
If you do not want to add this waypoint to a
route:
To add a waypoint to a
route as you are marking its
position, enter the desired
route number, highlight
‘SAVE?’ and press ENTER.
1. Highlight the ‘save’ field and press the F key.
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REFERENCE
Nearest
Waypoints Page
Page 20
Waypoint Submenus
The GPS 120XL has three waypoint submenu pages
that let you manage a large number of waypoints quickly and efficiently. The nearest waypoints, waypoint list
and waypoint definition pages are accessed through the
Menu Page.
To select a waypoint submenu page:
1. Press J or Q until the Menu Page appears.
2. Use the U and D keys to highlight the waypoint
submenu page you want to use.
3. Press F to display the submenu page.
4. To return to the Menu Page, press the J key.
Nearest Waypoints Page
To select a waypoint submenu, highlight the desired
option and press ENTER.
The nearest waypoints page shows the nine nearest
waypoints that are within 100 miles of your present
position, with the bearing and range noted for each
waypoint. During an emergency, the nearest waypoints
page can give you the closest points of safety in your
area at a glance.
The nearest waypoints page will also let you retrieve
a waypoint definition page or GOTO a selected waypoint right from the list.
To review the waypoint definition page of a highlighted waypoint from the list:
1. Press the F key.
The compass heading
(BRG) and distance (DST)
to the nine nearest waypoints are updated continuously.
To return to the nearest waypoint page (when the
‘done’ field is highlighted):
1. Press the F key.
To go to a highlighted list waypoint:
1. Use the U and D keys to highlight a listed waypoint.
2. To select a highlighted nearest waypoint as a destination, press the G key.
20
3. Once the GOTO waypoint page appears, press the
F key to confirm the selected waypoint as your
destination.
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Page 21
Waypoint List Page
The waypoint list page provides you with a complete list of all waypoints currently stored in the GPS
120XL. The total number of used and empty waypoints
is indicated above the waypoint list. From the waypoint
list page, you can retrieve a waypoint definition page,
delete all user-defined waypoints, or GOTO a selected
waypoint. If a waypoint is currently used in a route, the
lowest route number will be indicated to the left of the
waypoint name.
REFERENCE
Waypoint List
Page
To review the waypoint definition page of a highlighted list waypoint:
1. Press the F key.
To return to the waypoint list page (with the
‘done’ field highlighted):
1. Press the F key.
To GOTO a list waypoint:
1. Use the U and D keys to scroll through the list
and select a waypoint.
2. To select a highlighted waypoint as a destination,
press the G key.
The total number of used
and available waypoints is
indicated at the top of the
page. Route waypoints are
indicated by an ‘R__’.
Above, R03 means route 3.
3. Once the GOTO waypoint page appears, press the
F key to confirm the selected waypoint as your
destination.
To delete all user-defined waypoints:
1. Use the U or D keys to move the cursor highlight to the ‘delete all waypoints’ field.
2. Press the F key.
A warning page will appear, asking if you are sure
you want to delete all user-defined waypoints and
routes. If you want to continue and delete:
1. Press the L key to highlight the ‘Yes’ field.
Deleting all user waypoints
will also delete all routes
stored in memory.
2. Press the F key.
3. Press the Q key to return to the Menu Page.
If you do not want to delete all waypoints:
1. Press F with the ‘no’ field highlighted.
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REFERENCE
Waypoint
Definition Page
Page 22
Waypoint Definition Page
The last of the three waypoint management pages is
the waypoint definition page. This page lets you create
new waypoints manually, or review and edit existing
waypoints.
Waypoint
Name
Position
Coordinates
Waypoint Comment
Reference
Waypoint
Distance from
Reference
Waypoint
Bearing from
Reference
Waypoint
Function Prompts
Use the waypoint definition
page to review, rename, or
delete stored waypoints and
to create new waypoints
manually.
To create a new waypoint manually, you’ll need to
know its position coordinates or its distance and bearing from an existing waypoint.
To create a waypoint by entering coordinates:
1. If a waypoint is currently displayed in the name field,
highlight ‘NEW?’ and press F. Then press the L
key to clear the name field.
2. Use U and D to enter your waypoint name and
use L and R to move to the next character position.
3. Press F to confirm the waypoint name. The position field will now become highlighted, with the receiver’s last known position shown, if one exists.
4. Press F to begin entry of the position.
To create a new waypoint
by manually entering coordinates or by referencing an
existing waypoint, highlight
the ‘NEW?’ prompt and
press the ENTER key.
5. Use the U and D keys to enter your position, and
use the L and R keys to move to each character
field.
6. Press F to confirm and save your coordinates. The
default waypoint comment (UTC date and time of creation) will appear, and the highlight will move to
‘DONE?’.
7. Press the F key to return to the Menu Page.
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Page 23
Reference Waypoints
To create a new waypoint manually without knowing its position coordinates, you’ll need to enter its
bearing and distance from an existing waypoint. The
GPS 120XL will then calculate the position coordinates
for you.
To create a new waypoint by referencing a stored
waypoint:
1. Press U until the ‘NEW?’ field is highlighted.
2. Press F.
3. Enter the name of your new waypoint.
4. Press the F key to confirm the waypoint name.
The position field will now become highlighted, with
the receiver’s last known position shown.
5. Press D to move the cursor to the reference field.
6. Press F to begin entry of the reference waypoint
or leave this field blank to use your present position.
7. Use the arrow keypad to enter the waypoint name.
8. Press the F key to confirm your entry.
9. Enter the bearing and distance of your new waypoint
from the reference waypoint. Remember to use the
F key to begin entry and confirm each field. The
coordinates will be calculated and saved for your
new waypoint.
10. Press the F key (with the ‘done’ field highlighted)
to return to the Menu Page.
REFERENCE
Reference
Waypoints
The GPS 120XL’s advanced
waypoint and planning features allow you to create
new waypoints and practice
navigation without ever
leaving the slip.
If you create a new waypoint by entering coordinates from a map, you may
want to re-mark the waypoint’s exact position once
you get there. To re-define
an existing waypoint’s position coordinates from the
waypoint definition page,
simply highlight the ‘DST’
field and press ENTER. Use
the LEFT arrow key to set
the distance to 0.00, and
press ENTER to confirm.
The old coordinates will be
replaced by the coordinates
of your present position
(you must have a valid 2D
or 3D position fix).
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REFERENCE
Editing,Deleting
& Renaming
Waypoints
Page 24
Editing Existing Waypoints
The waypoint definition page also allows you to
change the name, coordinates, comment or reference
waypoint field for a stored waypoint (Fields shown on
page 22).
To edit the name, coordinates, comment, or reference waypoint field:
1. Use U and D to highlight the field you want to
edit.
2. Press F to begin entry in the selected field.
3. Enter your new data.
4. Press the F key to confirm your changes.
Waypoint Comments
The waypoint comment
field will automatically display the date and time of
creation of the waypoint.
You may replace this with a
16-character custom comment at any time.
Each waypoint stored in the GPS 120XL has a userdefined 16-character comment field. The default comment is the UTC date and time of the waypoint’s
creation.
To change or add a comment:
1. Use the U and D keys to highlight the comment
field.
2. Press F to begin entry of your comment.
3. Enter the comment and press the F key to confirm.
Renaming and Deleting Waypoints
To access the rename function from the waypoint definition page, highlight the
‘RENAME?’ prompt and
press ENTER.
24
The rename and delete function fields are located at
the bottom left of the waypoint definition page (you’ll
need to use the L key to move the field highlight out of
its standard up-and-down scrolling sequence).
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Page 25
To rename a stored waypoint:
1. Highlight the ‘RENAME?’ field and press F.
2. Enter the new waypoint name and press F.
3. Press the F key to confirm your changes.
REFERENCE
Editing and
Scanning
Waypoints
To delete a stored waypoint:
1. Highlight the ‘DELETE?’ field and press F.
2. Press the L key to select the ‘YES’ prompt.
3. Press F to delete the waypoint.
Scanning Waypoints
A warning page will ask you
for confirmation to delete
the selected waypoint.
Note: If a waypoint is part
of a route, it must be
removed before it can be
deleted. (See p 34)
As you manually enter a waypoint’s name, the GPS
120XL’s waypoint scanning feature will automatically
display the first numerical or alphabetical match of the
character you have entered to that point. This helps
eliminate the need to always enter a waypoint’s complete name.
To scan waypoints from a waypoint field:
1. Highlight the waypoint name field and press F.
2. Press the L key to clear the name field.
3. Use the U and D keys to scroll through waypoints.
4. If you have more than one waypoint that begins with
the same letter or number, you must use the R key to
move to the next character positions as needed. Only
the first character match is listed for each name.
5. Once you’ve found the desired waypoint, press F.
Waypoint names will
appear
alphabetically
when scanning waypoints.
If two waypoints begin with
the same letter(s) you must
move the cursor to the first
letter they do not have in
common for them to appear.
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REFERENCE
Starting/Stopping
a GOTO & MOB
Page 26
Selecting a GOTO Destination
The GPS 120XL provides four ways to navigate to a
destination: GOTO, MOB, TracBack and route navigation. The most basic method of selecting a destination is
the GOTO function, which lets you choose any stored
waypoint as the destination and quickly sets a direct
course from your present position.
To activate the GOTO function:
1. Press the G key. The GOTO waypoint list, an alphabetical list of all available waypoints, will appear.
2. Use the U and D keys to select the waypoint you
want to navigate to (it may already be highlighted).
3. Press the F key to confirm, or Q to stop selection of a GOTO destination and return to the previous
page.
Select a destination waypoint from the GOTO waypoint list.
Once a GOTO waypoint has been activated, the
Compass Page or Highway Page will provide steering
guidance to the destination until either the GOTO is
cancelled or the unit has resumed navigating the active
route (see page 34).
To cancel an active GOTO:
1. Press the G key.
2. Use the arrow keypad to move the field highlight to the
‘CANCEL GOTO?’ prompt at the bottom of the page and
press F.
Man Overboard Function
Once the MOB mode has
been activated, steering
guidance will be provided
by the highway or compass
page. Activating another
MOB will replace the previous MOB waypoint.
The GPS 120XL’s man overboard function (MOB)
lets you simultaneously mark and set a course to a position for quick response to passing positions (like the
spot where your hat blew overboard).
To activate the MOB mode:
1. Press the B key. The GOTO waypoint page will
appear with ‘MOB’ selected as the default destination.
2. Press the F key to begin MOB navigation.
26
The GPS 120XL will now guide you to the MOB
waypoint until the MOB GOTO is cancelled (see “to
cancel an active GOTO” above). If you want to save the
MOB waypoint, be sure to rename it, because it will be
overwritten the next time a MOB is executed.
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Page 27
TracBack Navigation
The third method of navigating to a destination is
by using the GARMIN’S patented TracBack feature. The
TracBack function allows you to quickly and easily
retrace your path using the track log automatically
stored in the receiver’s memory. The advantage of the
TracBack feature is to eliminate the need to mark waypoints along the way and manually create and activate
a route back to where you began your trip.
REFERENCE
TracBack
Navigation
The TracBack route is created by reducing your
current track log into a route of up to 30 waypoints,
and activating an inverted route along those points.
Once activated, a TracBack route will lead you back to
the oldest track log point stored in memory, so it’s usually a good idea to clear the existing track log at the
starting point of your current trip (e.g. your car or the
dock) before you get started.
To clear the track log and define a starting point
for a TracBack route:
1. From the Menu Page, highlight ‘TRACK LOG’.
Clearing the log before you
get started will define the
position the TracBack function will return you to.
2. Press F to access the track log page.
3. Use the U key to highlight the ‘CLEAR LOG?’ option.
4. Press F. A confirmation page will appear.
5. Use L to highlight the ‘Yes?’ prompt and press F.
To activate a TracBack route:
1. From the Menu Page, highlight ‘TRACK LOG’ option.
2. Press F to access the track log page.
3. Highlight the ‘TRACBACK?’ option and press F.
Once the TracBack function has been activated, the
GPS 120XL will take the track log currently stored in
memory and divide it into segments called legs. Up to
30 temporary waypoints (e.g., ‘T001’) will be created to
mark the most significant features of the track log in
order to duplicate your exact path as closely as possible. A TracBack route from your present position to the
oldest track log point will be created as the active route
(the active route page will appear), and provide steering guidance to each waypoint back to the starting
point of your track log.
Highlight ‘TRACBACK?’
and press ENTER to begin
TracBack navigation.
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REFERENCE
TracBack
Navigation
Page 28
Tips on Creating and Using the TracBack Feature
The GPS 120XL’s TracBack feature is designed to
help you quickly create and activate a route that follows
your path back to a user-defined starting point. To get
the most out of the TracBack feature, remember the following tips:
• Always clear your track log at the exact point that
you want to go back to ( truck, dock, etc.).
• The ‘RECORD’ option on the track log setup page
must be set to the ‘Yes’ position.
• There must be at least two track log points stored
in memory to create a TracBack route.
The TracBack feature will
navigate your track log
back to the oldest point in
the receiver’s memory.
• If there are not enough available waypoints in
memory to create a TracBack route, you will be
alerted with a ‘waypoint memory full’ message,
and the receiver will use any available waypoints
to create a TracBack route with an emphasis on
the track log closest to the destination (the oldest
track log point in memory).
• If the ‘CRITERIA’ option on the track log setup
page is set to a time interval, the TracBack route
may not follow your exact path (the automatic setting will provide the best TracBack route).
• If the receiver is turned off or you lose satellite
coverage during your trip, the TracBack route will
simply draw a straight line between any point
where coverage was lost and where it resumed.
The track log will be divided
into segments with temporary waypoints to create a
route back to the beginning
of the track log.
28
• If the changes of direction and distance of your
track log are very complex, 30 waypoints may not
be enough to accurately mark your exact path.
The receiver will then assign the 30 waypoints to
the most significant points of your track.
• If you want to save a TracBack route, copy route 0
to an open storage route before activating another
TracBack. Activating another TracBack or storage
route will overwrite the existing TracBack route.
• Whenever a TracBack route is activated, temporary waypoints (e.g., ‘T001’) that are not contained in routes 1-19 are erased. If there are temporary waypoints stored in routes 1-19, the
receiver will create any new temporary waypoints
using the first three-digit number available.
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Page 29
REFERENCE
Creating and Navigating Routes
The last form of navigating to a destination with
the GPS 120XL is by creating a user-defined route. The
route navigation feature lets you plan and navigate a
course from one place to another using a set of predefined waypoints. Routes are often used when it’s not
practical, safe or possible to navigate a direct course to
a particular destination (e.g., through a body of water
or impassable terrain).
Route
Navigation
Routes are broken down and navigated in smaller
segments called “legs”. The waypoint you are going to
in a leg is called the “active to” waypoint, and the waypoint immediately behind you is called the “active
from” waypoint. The line between the “active to” and
the “active from” waypoint is called the “active leg”.
ä
Waypoint 2
“Active Leg”
(“active to” waypoint)
ä
ä
}
ä
Waypoint 1
(“active from” waypoint)
Whenever you activate a route with the GPS
120XL, it will automatically select the route leg closest
to your position as the active leg. As you pass each
waypoint in the route, the receiver will automatically
sequence and select the next waypoint as the “active to”
waypoint.
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REFERENCE
Defining a
Route
Page 30
Route Definition Page
The GPS 120XL lets you create and store up to 20
routes of 30 waypoints each. Routes are created, copied
and edited through the route definition page, which is
accessed through the Menu Page.
To select the route definition page:
1. Press J until the Menu Page appears.
2. Use the U and D keys to highlight the ‘ROUTES’
option.
3. Press the F key to display the route definition
page.
4. To return to the Menu Page, press J.
If you’re heading out without a planned route, the
mark function can be used
to quickly create a route
back to your starting point.
Create a series of waypoints
along the way with the
MARK key and save them
to an open route from the
mark position page. When
you’re ready to head back,
simply activate the route
you created in inverted
order (see page 32).
30
Route
Number
Comment
Field
Desired
Track of Leg
Leg Distance
Total Route
Distance
Copy Field
Function Prompts
The route number field is displayed at the top of the
page, with a 16-character user comment below. If no
user comment is entered, the field will display the first
and last waypoint in the route. The waypoint list in the
middle of the page accepts up to 30 waypoints for each
route, with fields for desired track and distance between
legs. The total distance of the route is indicated below
the waypoint list.
The bottom of the route definition page features
several function fields which let you copy, clear, invert
or activate the displayed route. Routes 1-19 are used as
storage routes, with route 0 always serving as the active
route you are navigating. If you want to save a route
currently in route 0, be sure to copy it to another open
route, as it will be overwritten by the next route
activation.
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Page 31
To create a route from the route definition page:
1. Highlight the route number field and press F.
2. Enter a route number and press the F key to confirm.
REFERENCE
Creating,
Copying &
Clearing Routes
3. Press F to begin entry of a route comment. (Note
that the default [first and last waypoint] comment will
only appear if the comment field is blank.)
4. Enter your comment and press the F key.
5. Highlight the No. 1 waypoint field and press F.
6. Enter the first waypoint of your route and press F.
7. Continue entering the rest of your waypoints in order,
using the F key to start and confirm each field
entry. The list will automatically scroll down.
8. After you have entered all your waypoints, press
J.
Copying and Clearing Routes
The route definition page is also used to copy a
route to another route number. This feature is useful
when you make changes to the active (or TracBack)
route and want to save the route for future use.
Enter each waypoint in the
order you would like to navigate them. If you enter a
waypoint not stored in
memory, you’ll need to
define the position on the
waypoint definition page.
To copy a route:
1. Highlight the route number field and press F.
2. Enter the route number to be copied and press F.
3. Highlight the ‘COPY TO’ field and press F.
4. Scroll through the available routes and select a destination route number. Only open routes will be available as choices. Press the F key to copy the
route.
5. Press the J key to return to the Menu Page.
To clear a route from memory:
1. Highlight the route number field and press F.
To copy a route, select an
open storage roue and press
the ENTER key. If you select
a route that is already used,
you’ll be alerted with a
‘Roue Full’ Message.
2. Enter the route number and press F.
3. Select the ‘CLR?’ prompt and press F.
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REFERENCE
Clearing,
Activating and
Inverting Routes
Page 32
Clearing Routes (continued)
The clear route warning will appear, asking you to
confirm that you want to remove all waypoints from the
route.
1. Highlight the ‘Yes?’ field with the L key.
2. Press F to confirm your action.
3. Press J to return to the Menu Page.
Activating and Inverting Routes
After a route has been entered, it can be activated in
its defined sequence or inverted from the route definition page. The process of activating or inverting a stored
route takes a storage route (routes 1-19) and copies it
into the active route (route 0) for navigation.
Clearing a route only
removes the waypoints from
the route selected. The waypoints used for the route
will still remain in memory
individually.
This system allows you to have an active route that
you may edit during navigation and save as an entirely
new route from the original. You will have to copy the
active route to an unused storage route to save it, since
new route or TracBack activation overwrites route 0.
To activate a route:
1. Select the route definition page and press the F
key to activate the route number field.
2. Enter the route number to be activated and press
F.
3. Move the field highlight to the ‘ACT?’ prompt and press
the F key.
Inverting a route allows you to navigate route legs in
reverse order without editing the original route.
To activate a route in inverted order:
To activate a route, highlight the ‘ACT?’ prompt and
press ENTER.
32
1. Follow the steps above, but select the ‘INV?’ prompt
and press F.
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Page 33
Active Route Page
Once a route has been activated, the active route
page will appear, displaying the waypoint sequence of
your route with the estimated time enroute (ETE) at
your present speed and distance to each waypoint. As
long as you are navigating an active route, the active
route page will become part of the primary page
sequence of the unit.
REFERENCE
Active Route
Page
The active route page will also allow you to change
the ETE field to display desired track (DTK) or estimated time of arrival (ETA) for each leg. In addition you
can also clear or invert the active route.
To display DTK or ETA for each leg:
1. Highlight the estimated time enroute (ETE) field and
press the F key.
2. Use the U or D keys to select ‘DTK’ or ‘ETA’ and
press the F key.
The active route page also allows you to clear (stop
navigating) or invert the active route without using the
route definition page.
Whenever you have activated a route, the active route
page will appear in the primary page sequence after
the highway/compass page.
To invert a route from the active route page:
1. Press the U key once to move the field highlight to
the ‘INVERT?’ prompt.
2. Press the F key to invert the route.
To clear the active route from the active route
page and stop route navigation:
1. Use the U and L keys to select the ‘CLEAR?’
prompt.
2. Press the F key to clear the active route.
Editing Routes
Once a route has been created and stored, it can be
edited at any time, even if it is the active route.
To edit or review a route
waypoints from the active
route page, highlight the
desired waypoint and press
ENTER.
To edit a route from the active route page or the
route definition page:
1. Use the U and D keys to select the waypoint
you want to edit and press F.
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REFERENCE
Editing Routes&
On-Route
GOTO’s
Page 34
Editing Routes (continued)
An on-screen menu of editing choices will appear,
with options for reviewing, inserting, deleting or changing the waypoint field highlighted. Use the U and
D arrow keys to select among the editing choices.
Once you’ve selected a waypoint from the route
list, choose a menu function:
1. To review the definition page for the waypoint, highlight the ‘REVIEW?’ prompt and press F.
2. To add a new waypoint preceding the selected waypoint, highlight the ‘INSERT?’ prompt and press F.
3. To remove the selected waypoint, highlight the
‘REMOVE?’ prompt and press the F key.
4. To replace the selected waypoint with a new waypoint, highlight the ‘CHANGE?’ prompt and press F.
Use the on-screen menu to
select the desired editing
function.
Use the route waypoint editing instructions
described earlier for creating a route to complete your
changes. If you are editing the active route (route 0),
copy your new route version to an empty route to save
it, because the active route will be overwritten by a new
route activation.
If you add, delete or change the first or last waypoint of a route, the default comment (first and last
waypoint) will automatically be updated.
On-Route GOTOs
You can skip ahead and
navigate to any route waypoint by highlighting the
desired waypoint and pressing the GOTO key.
At the beginning of this section, we mentioned that
the GPS 120XL will automatically select the route leg
closest to your position as the active leg. This will give
you steering guidance to the desired track of the active
leg. If you would prefer to steer directly to a route waypoint, you can perform an “on-route GOTO” from the
active route page.
1. Use the U and D keys to highlight the desired
route waypoint and press the G key.
2. Once the GOTO waypoint page appears, press F to
confirm the on-route GOTO waypoint.
34
Note that after you reach the on-route GOTO waypoint, the GPS 120XL will automatically resume navigating the rest of the route in sequence.
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Page 35
User-Defined Navigation Pages
Once you’ve selected a GOTO destination or activated a MOB or route, the GPS 120XL will provide
graphic steering guidance to the destination with one
of two navigation pages:
• The Highway Page (the default navigation page)
provides a graphic highway that shows your
movement relative to the desired course, with an
emphasis on your crosstrack error (the distance
and direction you are off course). The Highway
Page is well suited for boating and other activities
with higher speeds and straight line courses to a
destination.
• The Compass Page provides a directional pointer
to the destination, with a rotating compass graphic to display your direction of travel. The
Compass Page is ideal for activities like trawling
or entering a harbor, and provides better steering
guidance for slow-speed (e.g., walking) travel
with many directional changes.
Both pages provide a digital display of the bearing
and distance to the destination, your current speed and
track over the ground, and course deviation indicator
(CDI). Select the desired navigation page at any time.
REFERENCE
Highway &
Compass Pages
To switch the navigation
page to the Compass Page,
press ENTER twice.
To switch the navigation
page to the Highway Page,
press ENTER twice.
To select the Compass or Highway Page:
1. Press J until the current navigation page appears.
2. Press F. An on-screen box will appear, with the
navigation page not currently in use highlighted as
the default.
3. Press F to switch the navigation screen.
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REFERENCE
Highway Page
Page 36
Using the Highway Page
The GPS 120XL’s Highway Page also provides graphic steering guidance to a destination, with a greater
emphasis on the straight-line desired course and the
distance and direction you are off course. The bearing
and distance to a waypoint, along with your current
track and speed are displayed at the top of the screen,
with your estimated time enroute (ETE) and velocity
made good (VMG, or the rate you are closing in on
your destination) at the bottom.
Bearing to
Waypoint
Distance to
Waypoint
Track Over
Ground
Speed Over
Ground
Destination
Waypoint
In this example, the
Highway Page indicates
that you are off course to
the right. Steer left to get
back on course. Notice the
emphasis of the Highway
Page is on the desired
course.
If you get too far off course,
a message box will appear
to indicate what course to
steer to get back on course
most efficiently.
36
Graphic
Highway
CDI
Velocity
Made Good
Estimated
Time Enroute
Pointer to Waypoint
As you head toward your destination, the middle
section of the screen provides visual guidance to your
waypoint on a moving graphic “highway”. The moving
arrow just below the course deviation scale always
points to your selected waypoint relative to the direction you are moving.
Your present position is represented by the diamond
in the center of the course deviation scale. The line
down the middle of the highway represents your
desired track. As you navigate toward a waypoint, the
highway will actually move, indicating the direction
you’re off course, relative to the position diamond on
the CDI scale. To stay on course, simply steer toward
the center of the highway.
If you do get off the desired course by more than
1/5th of the selected CDI range, the exact distance you
are off course will be displayed where the CDI scale setting normally appears (see the example at left). If you
get too far off course (the highway has disappeared), a
message box will appear to indicate what course to steer
to get back on course.
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Page 37
REFERENCE
Using the Compass Page
The GPS 120XL’s Compass Page provides graphic
steering guidance to a destination waypoint. The bearing (BRG) and distance (DST) to the waypoint are displayed at the top of the page, right below the destination waypoint field. The distance displayed is always
the straight-line distance from your present position to
the destination waypoint. The bearing indicates the
exact compass heading from you to the destination.
Bearing to
Waypoint
Graphic
Compass
Compass Page
Destination
Waypoint
Distance to
Waypoint
Pointer to
Waypoint
Track Over
Ground
Speed Over
Ground
The middle of the page features a rotating “compass”
that shows your current cardinal heading while you’re
moving (track up), with a pointer arrow in the center to
indicate the direction of the destination relative to the
direction you are moving. The compass rose and pointer
arrow combine to show current direction and current
destination at a glance.
In this example, the
Compass Page indicates
that you are traveling in an
easterly (088 degrees)
direction and the destination waypoint is northeast
(058 degrees) of your current direction of travel.
The bottom of the Compass Page shows your current
track (TRK) and speed (SPD) over the ground.
When you are one minute away from the destination
(based on your current speed and track over the ground),
the GPS 120XL will alert you with a flashing on-screen
message box.
In this example, the
Compass Page indicates
that you are traveling in a
northerly (031 degrees) and
the destination waypoint is
east (057 degrees) of your
current direction of travel.
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REFERENCE
Map Page
Page 38
Map Page
The GPS 120XL features a powerful real-time moving map that can do much more than just plot your
course and route. The Map Page also provides you with
a target cursor that will let you pan ahead to nearby
waypoints, determine the distance and bearing to any
map position, and mark new waypoints while you
navigate.
Bearing to
Waypoint
Distance to
Waypoint
Present
Position
The GPS 120XL has onscreen range rings to help
you estimate distances relative to your present position. The value of each ring
is determined by the current
zoom scale, and is equal to
1/5 of the selected scale.
To turn the range rings display on or off (the default
setting is OFF) see the map
setup instructions on pages
51-52.
38
Track Over
Ground
Speed Over
Ground
The map contains 12 selectable range scales from
0.2 to 320 miles (0.5 to 600 km). The scale represents
the distance shown from the top of the screen to the
bottom. Move from scale to scale by using the dedicated
zoom keys (IN and OUT). Pressing IN decreases the
scale and pressing OUT increases the scale.
A diamond icon in the center of the page represents
your present position, with your track and/or route displayed as a solid line. Nearby waypoints are shown as
squares, with the corresponding name listed. You may
select which items are shown through the map setup
submenu page (see pages 51-52 for more information).
The four corners of the Map Page are used to display various navigation data, including the bearing and
distance to a destination waypoint and your current
track and speed over the ground. The two fields at the
top corners of the map show your bearing and distance
to one of three selectable destinations: an active destination waypoint; a highlighted on-screen waypoint; or the
panning target crosshair. If you are not navigating to a
waypoint or using the panning function, the top data
fields will not be displayed. The bottom corners of the
display always show your current track and speed.
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Page 39
Zooming, Panning, and Pointing
There are three main functions you can perform
from the Map Page: zooming, panning, and pointing.
Zooming is increasing or decreasing the display scale of
the map. Panning is using a target crosshair and the
arrow keypad to “slide” the map window in any direction, including diagonally, to view the surrounding
area. Pointing is the act of highlighting a waypoint on
the map in order to find out more about the waypoint
and conduct a GOTO, or highlighting a position on the
map to create a new waypoint and conduct a GOTO.
REFERENCE
Map Zooming,
Panning, &
Pointing
To select a zoom scale (even while panning):
1. Press I or H once for each level of increase or
decrease desired.
2. Press and hold down either key to increase or
decrease by more than one scale.
To activate the pan function:
1. Press the arrow keypad in any direction, including
diagonally.
As you begin to move the map, a crosshair will
appear. This crosshair will now serve as a target marker
for the moving map. The distance and bearing from
your present position to the target crosshair will appear
in the upper corners of the map. If you are conducting
a GOTO at the time you activate the panning function,
the crosshair bearing and distance will replace the bearing and distance of the GOTO waypoint.
As you pan around the map, you’ll notice that the
target crosshair will point to on-screen waypoints and
highlight the waypoint name. Once a waypoint name is
highlighted, you can review its waypoint definition
page or execute a GOTO function right from the Map
Page.
To review the definition page for a waypoint
highlighted on the map:
1. Press F. The waypoint definition page will appear.
Review and make any desired changes to the highlighted waypoint.
2. When finished, highlight the ‘DONE?’ field and press
F.
To change the map scale,
press the IN or OUT key
once for each level desired.
An on-screen window will
display the current zoom
scale.
The crosshair will “snap” to
waypoints highlighted on
the map, which allows you
to quickly review or GOTO
the selected waypoint right
from the Map Page.
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REFERENCE
Using the
Cursor on the
Map
Page 40
Zooming, Panning, & Pointing (continued
To go to a waypoint highlighted on the map:
1. Press the G key.The GOTO waypoint page will
appear with the waypoint’s name highlighted.
2. Press the F key to confirm.
To stop the panning function and display your
present position:
1. Press the Q key.
Using the Cursor to Mark and GOTO Waypoints
To mark a waypoint with
the crosshair, simply pan to
the desired position and
press the ENTER key.
During panning, the crosshair represents a target
position right on the moving map, with the range and
bearing to the target displayed at the top corners of the
screen.
To mark the target crosshair position as a new
waypoint:
The crosshair may also be
used to define a GOTO destination by panning to the
desired position and pressing the GOTO key. To save
the MAP waypoint, rename
it, as it will be overwritten
by the next MAP waypoint.
1. Press the F key to capture the position.
2. Enter a new name and route number and press F.
You can also use the target crosshair as an instant
GOTO destination. This function will mark and instantly set a course for a new waypoint called ‘MAP’.
To GOTO the target crosshair:
1. Press the G key to capture the position.
2. Press the F key to confirm the MAP GOTO.
40
To save the MAP waypoint,rename it, as it will be
overwritten the next time a map GOTO is executed.
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Page 41
Menu Page
The GPS 120XL Menu Page provides access to submenu pages that are used to select and customize operation and navigation setup. The 11 submenus are
divided into categories by function. See pages 19-34 for
a discussion of waypoint and route management submenus. We’ll now address the rest of the submenus in
the order they appear on the Menu Page.
REFERENCE
Menu Page &
Distance/Sun
Calculation
To select a submenu page from the Menu Page:
1. Highlight the submenu page you want to view.
2. Press the F key to display the submenu page.
3. To return to the Menu Page, press the Q key.
Distance and Sun Calculation
The distance and sun calculation page will give you
the distance and bearing between any two waypoints
and will calculate the sunrise and sunset (in local time)
at a destination waypoint for a particular date.
To perform a distance and sun calculation:
To select a submenu, use the
UP and DOWN arrow keys
to highlight a menu option
and press ENTER.
1. Highlight the ‘from’ field and enter the desired waypoint. Press F to move to the next field.
2. Highlight the ‘to’ field and enter the destination waypoint. Press the F key to calculate the range and
bearing to the destination waypoint.
3. Highlight the ‘date’ field and enter the date for your
destination. Press the F key to display the sun
information.
Message Page
The message page is used to display all messages in
the GPS 120XL. There are two types of messages: temporary alerts (e.g. approaching a waypoint) and condition alerts (e.g., battery power is low). All messages are
indicated by a flashing on-screen box. After a temporary alert has been viewed, it is cleared. Condition
alerts are displayed on the message page until the condition has been resolved.
The GPS 120XL will calculate the sunrise and sunset
times of any stored waypoint or your present position. To calculate, enter the
date and year and press
ENTER.
To view the message page:
1. Highlight the ‘MESSAGES’ field and press F.
See Appendix C for a complete list of messages.
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REFERENCE
Track Log Setup
Page 42
Track Log Setup Page
The track log setup page lets you manage the GPS
120XL’s tracking data. From this page, you can select
whether or not to record a track and define how it is
recorded. Note: Track display options (showing or not
showing a recorded track log on the Map Page). are
addressed on page 52.
To turn track log recording on or off:
1. Highlight the ‘RECORD’ field and press F.
2. Select ‘Yes’ or ‘No’ and press F. NOTE: Turning the
track recording off will disable the TracBack feature.
Track Criteria
Turning the track recording
option off will prevent you
from using the TracBack
option.
The stored track criteria determines how often positions are stored in the track log. The default setting is
automatic, which will store a track based on resolution.
This setting gives you the most efficient use of track
memory and provides the most accurate TracBack route.
To change the criteria to record points based
upon a specific time interval:
1. Highlight the ‘CRITERIA’ field and press F.
2. Use U or D to select ‘Time Interval’ and press
F.
3. Press F to begin entry of the interval.
4. Enter a value in hours, minutes and seconds, and
press the F key.
Managing and Clearing the Track Log
Entering a time interval in
to the track recording criteria will plot your position
points further apart than
they would be in the
“Automatic” setting. This
will increase the distance
you can travel without
using up your track log, but
will greatly reduce the effectiveness of TracBack.
42
The rest of the track log setup page displays the percentage of available memory currently used to store
track log data and function fields in order to clear the
track log memory and activate the TracBack feature.
To clear the track log:
1. Highlight ‘CLEAR LOG?’ and press F.
2. A warning page will appear, and ask you to confirm
your actions. Use the L key to move the field highlight
to the ‘Yes?’ field and press F.
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TracBack Function
The TracBack option lets you activate a TracBack
route using the track log (see pages 29-30 for more
information).
To activate a TracBack route:
REFERENCE
TracBack &
Interface
Options
1. Highlight the ‘TRACBACK?’ option and press F.
Interface Setup
The interface setup page lets you specify the interfacing formats for connecting external devices. There
are five interface options: GRMN/GRMN, None/None,
None/NMEA, RTCM/None, and RTCM/NMEA. Each
option lists the input format first, followed by the output format.
To select I/O format:
1. Highlight the I/O field and press F.
2. Use the U and D keys to toggle through and
select the desired setting, and press F.
The GRMN/GRMN setting is a proprietary format
that lets you exchange information such as waypoints,
routes and track logs between two GARMIN GPS
devices or a PC. During data transfer, the number of
packets being exchanged will be displayed on screen.
To select a transfer option:
A field for additional information will be displayed
when required for the selected interface option. Above,
the None/NMEA option will
allow input of NMEA versions and a baud rate.
Chose a ‘HOST’ field based
upon the type of information transfer you want to
occur between the two
interfacing devices.
1. Highlight the ‘host’ field and press F.
2. Use U and D to select a setting and press F.
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REFERENCE
DGPS Interface
The ‘NONE/NMEA?’ setting makes it possible to
output data to output information to devices like chartplotters and autopilots.
Page 44
To disable all interfacing capabilities, select the
None/None setting. If you want to output NMEA data
to compatible external devices without any differential
input capability, select the None/NMEA setting. Once a
NMEA output setting has been selected (with or without RTCM input), the NMEA field will become highlighted. NMEA formats 0180, 0182 or 0183 (1.5 or 2.0)
are available.
To select a NMEA format:
1. Press F to begin a NMEA selection.
2. Use U and D to select a format, and press F.
DGPS Interface
The selectable baud rate is
available for all RTCM
interface options.
44
The last two format settings allow the differentialready GPS 120XL to accept RTCM DGPS corrections in
RTCM 104 version 2.0 format. Using DGPS corrections
will improve receiver accuracy to 5-10 meters, regardless of errors induced by the U.S. government’s Selective
Availability (SA) program. The RTCM/NONE format
will allow connection to any manually tuned beacon
receiver by using the proper output interface. The baud
rate is selectable from the GPS 120XL.
The RTCM/NMEA selection controls the GARMIN
GBR-21 differential beacon receiver. Once a RTCM setting has been selected, the GPS 120XL will either automatically try to tune the last frequency and bit rate you
selected or will switch to the default frequency of 304.0
kHz with a bit rate of 100 bps if no previous beacon
has been tuned. You may also enter your own frequency
and bit rate if desired.
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Page 45
DGPS Interface (continued)
REFERENCE
To enter a DGPS beacon frequency:
1. Highlight the ‘freq’ field and press F.
2. Enter the desired frequency and press F.
DGPS Interface
& System Setup
3. Highlight the ‘rate’ field and press F.
4. Use U and D to select the desired transmission
rate.
5. Press the F key to confirm your entry.
When the GPS 120XL is receiving DGPS corrections from the GBR-21, the ‘beacon receiver’ section of
the I/O setup page will display the beacon frequency
and signal strength, as well as the distance from the
transmitter to the beacon receiver. At the bottom of the
beacon receiver field, a status message will keep you
informed of DGPS activity:
• A ‘Tuning’ message will be displayed while a beacon signal is being tuned.
Once a RTCM option is
selected, you must manually tune the beacon receiver
from the frequency field.
• Once the beacon signal has been tuned, a
‘Receiving’ message will be displayed.
• If a beacon signal is tuned and no corrections are
being received, a ‘No Data’ message will be displayed.
• If a beacon signal cannot be tuned, a ‘No Status’
message will be displayed.
The GPS 120XL will also display one of three alert
messages concerning DGPS operation through the message page:
No DGPS Position— not enough data is available
to compute a DGPS position.
No RTCM Input— the beacon receiver is not
properly connected or the baud rates do not
match.
Alert messages will signal
any problems with DGPS
operation.
RTCM Input Failed— DGPS data was being
received but has been lost.
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REFERENCE
Page 46
System Setup
Setting Time,
Screen Contrast,
& Tone
The next setup page is the system setup page, which
is used to select the operating mode, time offset and
screen preferences. The GPS 120XL has two operating
modes:
The GPS 120XL’s two operating modes are accessed
through the system setup
submenu.
• ’Normal’ Mode operates the unit at maximum
performance, and provides a battery of life up to
12 hours on alkaline batteries.
• ’Simulator’ Mode allows you to operate the unit
without acquiring satellites, and is ideal for practicing or entering waypoints and routes while at
home.
To select an operating mode:
1. Highlight the ‘MODE’ field and press F.
2. Use the arrow keypad to select a mode and press
F.
Date and Time Setup
To display the correct local
time, you must enter the
appropriate offset from the
chart at the end of
Appendix C.
The date and time field is located directly below the
mode field. Because the time shown is UTC time, you
will need to enter a time offset to display the correct
local time for your area. To determine the time offset for
your area, note your position and refer to the chart in
Appendix C.
To enter the time offset:
1. Highlight the ‘OFFSET’ field and press the F key.
2. Enter the time offset and press F. Remember to
select a positive or negative indicator for your offset.
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Page 47
Time Format
The time display shown on the system setup and
Position Pages may be set to display the time in a 12 or
24-hour format.
To select the time format:
REFERENCE
Navigation
Setup
1. Highlight the ‘HOURS’ field and press the F key.
2. Select 12-or 24-hour display, and press F to
confirm.
Screen Contrast
The GPS 120XL features adjustable screen contrast
and is controlled by using an on-screen bar scale.
To set the screen contrast:
1. Move the field highlight to the ‘CONTRAST’ field and
press the F key.
2. Use the L and R keys to adjust the bar scale for the
desired contrast and press the F key.
Choose 24-hour (military)
or 12-hour time display
from the ‘HOURS’ field.
Tone Setting
You may choose from three settings for audible
tone: messages only, messages and keystrokes, or no
tone at all.
Screen contrast may be
adjusted to your lighting
conditions with the contrast
bar.
To specify a tone setting:
1. Highlight the ‘TONE’ field and press the F key.
2. Use the U and D keys to select the desired tone
and press F.
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REFERENCE
Page 48
Navigation Setup
Navigation
Setup
The navigation setup page is used to select units of
measurement for position format, map datum, CDI
scale, and distance, speed and heading information.
Position Formats
The position format may be
set to display your choice of
many formats. Note: degree
and minutes is the default
setting..
The default position setting for the GPS 120XL is
latitude and longitude in degrees and minutes
(hdddºmm.mmm’). You may also select degrees, minutes and seconds (hdddºmm’ss.s’’); degrees only
(hddd.dddddº); UTM/UPS coordinates; or British,
German, Irish, Maidenhead, Swedish, Swiss or Taiwan
grid formats.
To select a position format:
1. Highlight the ‘POSITION FRMT’ field and press F.
2. Use the U and D keys to select the desired setting. Confirm the setting by pressing F.
Map Datums
Use any of the 106 separate
map datums to maximize
the operation of the GPS
120XL with your specific
map or chart.
The map datum field is located just below the position format field, and comes with a WGS 84 default setting. Although 104 total map datums are available for
use (see the map datum listing in appendix B), you
should only change the datum if you are using maps or
charts that specify a different datum than WGS 84.
To select a map datum:
1. Highlight the ‘MAP DATUM’ field and press F.
48
2. Use the U and D keys to toggle through and
select the desired setting. Confirm the setting by
pressing F.
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Page 49
CDI Scale Settings
The course deviation indicator (CDI) scale definition field lets you select the +/- range of the CDI bar
scale on the Highway Page. Three scales are available:
+/- 0.25, 1.25 and 5.0 miles or kilometers, with 0.25
being the default setting.
REFERENCE
Units of
Measure &
Speed Filter
To enter a CDI scale setting:
1. Highlight the ‘CDI SCALE’ field and press F.
2. Use the U and D keys to select the desired setting.
3. Press the F key to confirm the selection.
Units of Measure
The GPS 120XL lets you select nautical (default),
statute or metric units of measure for all speed and distance fields.
To change the unit of measure:
1. Highlight the ‘units’ field and press the F key.
2. Use U and D to select the desired unit of
measure.
Adjusting the CDI Scale will
determine the value used in
the Highway Page and for
the range rings on the Map
Page (if displayed).
3. Press the F key to confirm the selection.
Speed Filter
Choose a navigation unit
you are familiar with or
that may be appropriate to
the situation in which the
GPS 120XL is used.
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REFERENCE
Speed Filter &
Magnetic
Heading
Page 50
Speed Filter (continued)
The speed filter allows you to determine how the
GPS 120XL responds to changes in track or ground
speed. Three settings are available: automatic, on, or off.
The ‘Auto’ setting is the default and will monitor the
changes in your current track and speed and adjust the
receiver’s response time automatically. The ‘On’ setting
allows you to manually enter a response time up to 300
seconds. Selecting a higher setting may be desirable in
slow-speed applications with frequent changes in track.
To enter a value for the speed filter:
1. Highlight the ‘SPEED FILTER’ field and press F.
2. Select the ‘ON’ option and press F.
3. Highlight the “speed value” field and press the F
key.
Setting the speed filter to
‘On’ makes it possible for
you to select the receiver’s
time response to changes in
track or ground speed.
4. Use U and D to select the desired number of
seconds.
5. Press the F key to confirm the selection.
Magnetic Heading Reference
The GPS 120XL’s heading information can be displayed referencing magnetic north (auto or userdefined), true north or calculated grid headings. The
default setting is automatic magnetic north, which is
suitable for most applications.
The number entered represents a window of time the
GPS 125 Sounder considers
in adjusting to changes in
speed and track. For example, if 12 seconds is entered,
the speed displayed will
constantly represent the
speed averaged over the last
12 seconds.
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Page 51
Magnetic Heading Reference (continued)
To select a heading reference:
1. Highlight the ‘HEADING’ field and press F.
2. Select the desired heading preference.
REFERENCE
Magnetic
Heading & Map
Setup
3. Press the F key to confirm the selection.
To enter a user-defined magnetic heading:
.
1. Select the ‘USER MAG’ option and press F.
2. Use the U and D keys to enter the degrees
and direction of magnetic variation.
3. Press the F key to confirm the magnetic
variation value.
Map Setup and Orientation
The map setup page lets you select map orientation
and specify what items are displayed. The map may be
oriented to north up, the direction of current travel
(track up) or the direction of an active route leg
(desired track up). The default setting is track up.
To enter a user-defined
magnetic variation, select
the ‘User Mag’ option and
enter the desired direction
and value.
To change the map orientation:
1. Highlight the ‘ORIENTATION’ field and press F.
2. Use the U and D keys to toggle through and
select the desired setting, and press F.
Selecting Displayed Items on the Map Page
The rest of the map setup page lets you specify
what items are displayed or plotted on the Map Page.
The first four plot items may be turned on or off by
selecting ‘yes’ or ‘no’ in the appropriate field:
• The ‘RINGS’ selection will display the three present position range rings on the map.
• The ‘ROUTE’ selection will plot the straight leg
lines between waypoints of an active route and
display all route waypoint names.
The ‘North Up” orientation
causes the top-center of the
Map Page to represent
000º, the right-center to be
090º, the bottom-center
180º, and the left-center to
be 270º.
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REFERENCE
Map Page Setup
& Track Log
Display
Page 52
Selecting Displayed Items on the Map Page (cont.)
• The ‘NEAREST’ selection will display the nine
nearest waypoints to your present position (not to
the target cursor on the map).
• The ‘NAMES’ selection will display the waypoint
name for the nine nearest waypoints.
To turn a plotted item on or off:
1. Highlight the confirmation (Yes or No) field for the plotted item and press F.
2. Use U or D to select ‘Yes’/‘No’, and press F.
Track Log Display
On-screen range rings will
appear on the map when
the ‘RINGS’ option is set to
the ‘Yes’ position.
The track log option sets the number of points the
unit will attempt to display on the Map Page. The
default setting of 250 points provides good resolution
with minimal screen clutter. The maximum setting is
768 points. Once the maximum number of track points
is reached, the older points will be lost as new points
are added. Note that adjusting the points displayed will
not affect whether or not the receiver records a track log
or the ability to create a TracBack route.
To enter a log setting:
1. Highlight to the ‘track log’ field and press F.
2. Enter a value in the 3-digit field and press F. If you
do not want to display a track, enter ‘000’.
The screen resolution of the
track log may be changed
by increasing the number of
tracklog points displayed.
However, displaying too
many points may clutter
your screen .
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Page 53
Alarms Setup
REFERENCE
Alarms Setup
The alarms setup page is used to set the three
alarms available on the GPS 120XL: the anchor drag
alarm, arrival alarm, and CDI alarm.
The anchor drag alarm will sound if your boat has
moved outside a range measured from a central point
(your position). The arrival alarm sounds when you are
approaching a waypoint and have reached the user
defined distance. The CDI alarm will alert you when
your track varies from the shortest distance to a waypoint by the defined range.
When activated, the arrival
alarm will sound when you
reach the specified distance
from your destination
waypoint.
The arrival and CDI alarms may be set from 0.0 to
9.9 units. The anchor drag alarm may be set up to 9.99
distance units.
To set the alarms:
1. Move the highlight to ‘ALARMS SETUP’ and press
F.
2. Select the desired alarm distance field and press
F.
3. Enter the distance for the alarm and press F.
4. If you would like to change the ‘On/Off’ setting, press
the F key and use the U and D keys to turn
the alarm on or off.
5. Enter a setting and press the F key.
#
!
When setting the anchor drag alarm, remember that Selective Availability can degrade
your GPS position as much as 100 meters and
may cause false anchor drag alerts.
Use the CDI alarm to
ensure you maintain a
straight-line course to the
destination waypoint.
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REFERENCE
Nav Simulator
Page 54
Navigation Simulator
The GPS 120XL’s simulator mode lets you practice
all aspects of its operation without active satellite acquisition. You can also plan and practice trips, enter new
waypoints and routes, and save them for use during
normal operation. The simulator is activated from the
system setup page, with speed and heading controlled
from the Position, Compass or Highway Pages.
To activate the simulator:
1. Highlight ‘SYSTEM SETUP’ and press F.
2. Highlight the ‘MODE’ field and press F.
3. Use U or D to select the simulator mode and press
F.
4. Press F to return to the Menu Page.
Select the simulator mode
from the operation mode
choices and press ENTER.
You may return to normal
operation by changing the
operation mode or by turning the unit off.
Once the simulator mode has been activated, use
the Position, Compass or Highway Page to set your
speed and track. You may also enter a new position if
you desire (only from the Position Page).
To enter track, speed and position:
1. Highlight the ‘TRACK’ field and press the F key.
2. Enter a track heading and press F.
3. Highlight the ‘SPEED’ field and press F.
4. Enter a speed and press F.
5. Highlight the ‘POSITION’ field (Position Page only) and
press F.
6. Enter a position and press the F key.
#
!
54
The GPS 120XL does not track satellites in simulator mode. Although you can create and save
waypoints and routes while using the simulator
mode, never attempt to use the simulator mode
for actual navigation.
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Page 55
Installation
The GPS 120 XL must be properly installed according to the following instructions to get the best possible
performance.
APPENDIX A
Installation
To complete the standard installation, you will need
the following pieces:
• 1 amp in-line fuse (may be included with
Power/Datacable)
• Four 1/4” (6mm) diameter mounting screws
• 1” x 14 marine antenna mount and screws
Several optional accessories are also available to
provide flexible installation on any vessel. See your
GARMIN dealer for more information on these items:
• AC Adapter
• Antenna Cable Extension
• Cigarette Lighter Adapter
To begin installation, you’ll need to select a suitable
mounting position for the antenna and the unit. Once
you’ve identified the best mounting location, install the
antenna and cable first, then the unit and wiring
harness.
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 in all conditions.
Avoid mounting the antenna where it will be shaded by
the boat’s superstructure, a radome antenna, or mast.
Most marine VHF and loran antennas will not seriously
degrade the GPS antenna’s reception. Never paint the
antenna or clean it with harsh solvents.
To install the GPS antenna:
1. Screw the antenna directly onto the 1” – 14 mount.
2. Route the cable to the location of the display unit, using
the appropriate tie-wraps,escutcheon plates and sealant
to secure the cable along the route and through any
bulkhead or deck.
3. Once the GPS 120XL unit has been installed, connect the
cable to the antenna connector on the back of the display unit. Turn the antenna connector 1/4 turn clockwise
to lock the cable into place.
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APPENDIX A
Installation
Page 56
Mounting the GPS 120XL
The GARMIN GPS 120XL’s compact 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, overhead, or flush mounting. When choosing a location for the display unit, make sure you consider the following conditions:
• There should be at least 2.00” (5.0 cm) clearance
behind the case to allow connection of the antenna and power/data cables.
• The mounting surface should be rigid enough to
support the unit and protect it from excessive
vibration and shock.
To surface mount the GPS 120XL:
1. Place the mounting bracket in the desired location.
2. Mark and drill the four mounting holes for the fasteners you are using.
3. Fasten the bracket to the surface using the appropriate fasteners.
4. Insert the GPS 120XL into the mounting bracket.
5. Screw the two mounting knobs through the bracket
and into the GPS 120XL.
6. Connect the power/data and antenna cables to the
back of the unit, making sure the locking rings are
fully tightened on both connectors.
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Page 57
To flush mount the GPS 120XL:
APPENDIX A
Installation
The GPS 120XL can be mounted flush with a flat
panel of .08-.52” thickness using the cam lobe feature
on its mounting bracket.
1. Cut a 4.15” W x 4.67” H hole in panel.
2. Place GPS 120XL into hole from the front until its
flange rests against the mounting surface.
3. From the back side of the panel, loosely attach the
bracket such that the slot in the ratchet area points
away from the mounting panel.
4. Rotate the bracket downward until the panel
is pinched tightly between the units flange
and bracket lobe.
5. Tighten knobs and connect the power/data
and antenna cables. Note: If the panel is too thick to
allow use of the knobs supplied, use two M6 screws
to secure the bracket.
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APPENDIX B
Wiring &
Specifications
Page 58
Connecting the power/data cable
The power/data cable connects the GPS 120XL system to a 10-40 volt DC power source and provides interface capabilities for connecting NMEA devices and an
external alarm The diagram below indicates the appropriate harness connections.
To connect the GPS 120XL to a power source:
1. Connect the RED harness lead to the positive side of a 10-40 volt DC power source. Make sure
the power lead has an in-line 1-amp fuse installed.
2. Connect the BLACK harness lead to a ground strip or the negative side of a
10-40 volt DC power source.
PIN 1 (red): 10-40 volts DC
PIN 2 (black): Ground
3
4
5
2
6
1
(-)
PIN 3 (blue): NMEA out
(+)
10-40 volts DC
PIN 4 (brown): NMEA in
7
PIN 5 (white): No connection
Pin assignment
PIN 6 (green): No connection
PIN 7 (yellow): alarm low
(-)
Shield Grounded
Through GPS
Autopilot/
NMEA Device
GBR 21
Beacon
Receiver
Alarm/
Relay
(+)
To connect an external alarm, connect the ground side of the alarm device to the
YELLOW harness lead. (100 mA DC load max.) The following interface formats are supported by the GPS 120XL for driving three NMEA devices:
NMEA 0180, NMEA 0182,
NMEA 0183 version 2.0:
NMEA 0183 version 1.5:
Approved sentences:
Approved sentences:
GPBWC, GPGLL, GPRMB, GPRMC, GPXTE,
GPVTG, GPWPL
Proprietary sentences:
PGRMM (map datum), PGRMZ
(altitude), PSLIB (beacon rec. control)
58
GPGGA, GPGLL, GPGSA, GPGSV,
GPRMB, GPRMC, GPRTE, GPWPL
Proprietary sentences:
PGRME (estimated error), PGRMM (map
datum), PGRMZ (altitude), PSLIB (beacon
receiver control)
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Page 59
The GPS 120XL is constructed of high quality
materials and should not require user maintenance. Should
your unit ever need repair, please take it to an authorized
GARMIN service center. The GPS 120XL has no user serviceable parts. Never attempt any repairs yourself.
APPENDIX B
Wiring &
Specifications
To protect your GPS, never allow gasoline or other solvents to come in contact with the case or screen. Clean the
case and screen with a soft cloth and a household window
cleaner.
PHYSICAL
Case:
Gasketed construction
Size:
4.9”H x 5.3”W x 2.4”D
(15.6 x 5.1 x 1.23 cm)
Weight:
Less than 1 lb. (454g)
Temperature Range: 5º to 158ºF (-15º to 70ºC)
PERFORMANCE
Receiver:
Differential-ready MultiTrac8
Acquisition Time:
Approx. 20 seconds (warm)
Approx. 2 minutes (cold)
Approx. 7.5 minutes (AutoLocate)
Update Rate:
1/second, continuous
Position Accuracy:
5-10 meters (16-33 ft.) with DGPS corrections*
15 meters (49 ft.) RMS**
Velocity Accuracy:
0.1 knot RMS steady state, 99 knots max.
Dynamics:
Performs specification to 3g’s
POWER
Input:
10-40v DC
Usage:
2 watts
Specifications subject to change without notice
* With optional GARMIN GBR 21 Beacon Receiver Input.
** Subject to accuracy degradation to 100m 2DRMS under the U.S. DOD-imposed
Selective Availability Program.
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APPENDIX C
Messages &
Time Offsets
Page 60
The GPS 120XL uses a flashing on-screen message to
alert you to important information. Whenever the message
indicator appears, press the PAGE key to view the message
page. There are two types of messages: temporary alerts
and condition alerts. Temporary alerts are cleared from the
message page after viewing, while condition alerts remain
on the message page until the condition has been resolved.
Pay careful attention to all messages for your own safety.
Active WPT Can’t be Deleted—You have attempted to change the “active to” or “active
from” waypoint. Clear the active route or GOTO before making your changes.
Accuracy has been Degraded—The accuracy of the GPS 120XL has been degraded
beyond 500 meters due to poor satellite geometry or data quality. You should check other
navigational sources to verify the position indicated.
Already Exists—The name you are entering already exists in the GPS 120XL’s memory.
Approaching—You are one minute away from reaching a destination waypoint.
Battery Power is Low—The batteries are low and should be replaced.
No DGPS Position—Not enough data is available to compute a DGPS position.
No RTCM Input—Beacon receiver is improperly connected or baud rates do not match.
Poor GPS Coverage—The GPS 120XL cannot acquire the necessary number of satellites to
compute a position. Try another location with a clearer view of the sky.
Power Down and Re-init—The GPS 120XL is not able to calculate a position due to
abnormal satellite conditions. Turn the unit off and verify the last position shown by other
means. Try the unit again later, possibly in a different location.
Read Only Mem has Failed—The permanent memory has failed and the unit is not operable. Take your unit to an authorized GARMIN dealer for repairs.
Received an Invalid WPT—A waypoint was received during upload transfer that has an
invalid identifier.
Receiver has Failed—A failure in receiver hardware has been detected. If this message
persists, do not use the unit and take it to an authorized dealer for repair.
Route is Full—You have attempted to add more than 30 waypoints to a route.
Route is not Empty—You have attempted to copy into a route already in use.
Route Waypoint Can’t be Deleted—The waypoint you are trying to delete is part of a
route. Delete the waypoint from the route before removing it from memory.
Route Waypoint was Deleted—A route waypoint entered does not exist in the database
and has been deleted from the route.
RTCM Input has Failed—DGPS data being received has been lost. You are no longer
receiving the beacon signal.
Searching the Sky—The GPS 120XL is in searching the sky for almanac data or the unit is
in AutoLocateTM mode.
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Page 61
APPENDIX C
Messages &
Time Offsets
Route Waypoint was Deleted—A route waypoint entered does not exist in the database
and has been deleted from the route.
RTCM Input has Failed—DGPS data being received has been lost. You are no longer
receiving the beacon signal.
Searching the Sky—The GPS 120XL is searching the sky for almanac data or the unit is in
AutoLocateTM mode.
Stored Data was Lost—All waypoints, routes, time and almanac data have been lost due
to battery failure or clearing the receiver’s memory.
Transfer has been Completed—The receiver is finished uploading or downloading information to the connected device.
WPT Memory is Full—You have used all 250 waypoints in the GPS 120XL. Delete
unwanted waypoints to make room for new entries.
The chart below gives the UTC time offset for the various longitudinal zones. If
you are in daylight savings time, add one hour to the offset.
Longitudinal Zone
Offset
Longitudinal Zone
Offset
W180.0º to W172.5º
-12
E007.5º to E022.5º
1
W172.5º to W157.5º
-11
E022.5º to E037.5º
2
W157.5º to W142.5º
-10
E037.5º to E052.5º
3
W142.5º to W127.5º
-9
E052.5º to E067.5º
4
W127.5º to W112.5º
-8
E067.5º to E082.5º
5
W112.5º to W097.5º
-7
E082.5º to E097.5º
6
W097.5º to W082.5º
-6
E097.5º to E112.5º
7
W082.5º to W067.5º
-5
E112.5º to E127.5º
8
W067.5º to W052.5º
-4
E127.5º to E142.5º
9
W052.5º to W037.5º
-3
E142.5º to E157.5º
10
W037.5º to W022.5º
-2
E157.5º to E172.5º
11
W022.5º to W007.5º
-1
E172.5º to E180.0º
12
W007.5º to E007.5º
0
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APPENDIX D
Map Datums
Adindan
Afgooye
AIN EL ABD ‘70
Anna 1 Ast ‘65
ARC 1950
ARC 1960
Ascnsn Isld ‘58
Astro B4 Sorol
Astro Bcn “E”
Astro Dos 71/4
Astr Stn ‘52
Astrln Geod ‘66
Astrln Geod ‘84
Bellevue (IGN)
Bermuda 1957
62
Page 62
The following list shows the 104 map datums
available for the GPS 120XL. Menu Page abbreviations are listed first, followed by the corresponding map datum name and area.
Adindan- Ethiopia, Mali,
Senegal, Sudan
Afgooye- Somalia
AIN EL ANBD 1970Bahrain Island, Saudi Arabia
Anna 1 Astro ‘65- Cocos Isl.
ARC 1950- Botswana,
Lesotho, Malawi, Swaziland,
Zaire, Zambia, Zimbabwe
ARC 1960- Kenya, Tanzania
Ascension Island ‘58Ascension Island
Astro B4 Sorol Atoll- Tern
Island
Astro Beacon “E”- Iwo Jima
Astro Dos 71/4- St. Helena
Astronomic Stn ‘52- Marcus
Island
Australian Geod ‘66Australia, Tasmania Island
Australian Geod ‘84Australia, Tasmania Island
Efate and Erromango Islands
Bermuda 1957- Bermuda
Islands
Bogata Observ
Campo Inchspe
Canton Ast ‘66
Cape
Cape Canavrl
Carthage
CH-1903
Chatham 1971
Chua Astro
Corrego Alegr
Djakarta
Dos 1968
Easter Isld 67
European 1950
Bogata Obsrvatry- Colombia
Campo Inchauspe- Argentina
Canton Astro 1966- Phoenix
Islands
Cape- South Africa
Cape Canaveral- Florida,
Bahama Islands
Carthage- Tunisia
CH 1903- Switzerland
Chatham 1971- Chatham
Island (New Zealand)
Chua Astro- Paraguay
Corrego Alegre- Brazil
Djakarta (Batavia)- Sumatra
Island (Indonesia)
Dos 1968- Gizo Island
(New Georgia Islands)
Easter Island 1967
European 1950- Austria,
Belgium, Denmark, Finland,
France, Germany, Gibraltar,
Greece, Italy, Luxembourg,
Netherlands, Norway,
Portugal, Spain, Sweden,
Switzerland
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Page 63
APPENDIX D
Map Datums
European 1979
Finland Hayfrd
Gandajika Base
Geod Datm ‘49
Guam 1963
Gux 1 Astro
Hjorsey 1955
Hong Kong ‘63
Hu-Tzu-Shan
Indian Bngldsh
Indian Thailand
Indonesia ‘74
Ireland 1965
ISTS 073 Astro
Johnston Island
Kerguelen Islnd
Kertau 1948
L. C. 5 Astro
Liberia 1964
Luzon Mindanao
Luzon Philippine
Mahe 1971
Marco Astro
European 1979- Austria,
Finland, Netherlands,
Norway, Spain, Sweden,
Switzerland
Finland HayfordFinland
Gandajika Base- Republic
of Maldives
Geodetic Datum ‘49New Zealand
Guam 1963Guam Island
Gux 1 AstroGuadalcanal Island
Hjorsey 1955- Iceland
Hong Kong ‘63Hong Kong
Hu-Tzu-Shan- Taiwan
Indian- Bangladesh,
India, Nepal
Indian- Thailand,
Vietnam
Indonesia 1974Indonesia
Ireland 1965- Ireland
ISTS 073 ASTRO ‘69Diego Garcia
Johnston Island
Kandawala KandawalaSri Lanka
Kerguelen Island
Kertau 1948- West
Malaysia, Singapore
Cayman Brac Island
Liberia 1964- Liberia
Luzon- Mindanao Island
Luzon- Philippines
(excluding Mindanao
Island)
Mahe 1971- Mahe Island
Marco Astro- Salvage
Island
Massawa
Merchich
Midway Ast ‘61
Minna
NAD27 Alaska
NAD27 Bahamas
NAD27 Canada
NAD27 Canal Zone
NAD27 Caribbn
NAD27 Central
NAD27 CONUS
NAD27 Cuba
NAD27 Grnland
NAD27 Mexico
NAD27 San Sal
NAD83
Massawa- Eritrea
(Ethiopia)
Merchich- Morocco
Midway Astro ‘61Midway
Minna- Nigeria
North American 1927Alaska
North American 1927Bahamas (excluding San
Salvador Island)
North American 1927Canada and
Newfoundland
North Am. 1927- Canal
Zone
North American 1927Caribbean (Barbados,
Caicos Islands, Cuba,
Dom. Rep., Grand
Cayman, Jamaica,
Leeward and Turks
Islands)
North American 1927Central America (Belize,
Costa Rica,
El Salvador, Guatemala,
Honduras, Nicaragua)
North Am. 1927- Mean
Value (CONUS)
North American 1927Cuba
North American 1927Greenland
(HayesPeninsula)
N. American 1927Mexico
North American 1927San Salvador Island
North American 1983Alaska, Canada, Central
America, CONUS,
Mexico
63
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APPENDIX D
Map Datums
Nhrwn Masirah
Nhrwn Saudi A
Nhrwn United A
Naparima BWI
Obsrvtorio ‘66
Old Egyptian
Old Hawaiian
Oman
Ord Srvy GB
Pico De Las Nv
Ptcairn Ast ‘67
Prov S Am ‘56
Prov S Chln ‘63
Puerto Rico
Qatar National
Qornoq
Reunion
Rome 1940
RT 90
Santo (Dos)
Sao Braz
64
Nahrwn- Masirah Island
(Oman)
Nahrwn- Saudi Arabia
Nahrwn- United Arab
Emirates
Naparima BWI- Trinidad
and Tobago
Observatorio 1966Corvo and Flores Islands
(Azores)
Old Egyptian- Egypt
Old Hawaiian- Mean
Value
Oman- Oman
Old Survey Grt BritnEngland, Isle of Man,
Scotland, Shetland Isl.,
Wales
Canary Islands
Pitcairn Astro ‘67Pitcairn Isl.
Prov So Amricn ‘56Bolivia, Chile,Colombia,
Ecuador, Guyana, Peru,
Venezuela
Prov So Chilean ‘63- S.
Chile
Puerto Rico & Virgin
Islands
Qatar National- Qatar
Qornoq- South
Greenland
Reunion- Mascarene
Island
Rome 1940- Sardinia
Island
Sweden
Santo (Dos)- Espirito
Santo Island
Sao Braz- Sao Miguel,
Santa Maria Islands
(Azores)
Sapper Hill ‘43
Sapper Hill 1943- East
Falkland Island
Schwarzeck
Schwarzeck- Namibia
Sth Amrcn ‘69
South American ‘69Argentina, Bolivia, Brazil,
Chile, Colombia,
Ecuador, Guyana,
Paraguay, Peru,
Venezuela, Trinidad and
Tobago
South Asia
South Asia- Singapore
SE Base
Southeast Base- Porto
Santo and Madiera
Islands
SW Base
Southwest Base- Faial,
Graciosa, Pico, Sao Jorge
and Terceira Islands
(Azores)
Timbalai 1948
Timbalai 1948- Brunei
and E. Malaysia (Sarawak
and Sabah)
Tokyo
Tokyo- Japan, Korea,
Okinawa
Tristan Ast ‘68
Tristan Astro 1968Tristan da Cunha
Viti Levu 1916
Viti Levu 1916- Viti
Levu/ Fiji Islands
Wake-Eniwetok
Wake-EniwetokMarshall Isl.
WGS 72
World Geodetic System
1972
WGS 84
World Geodetic System
1984
Zanderij
Zanderij- Surinam
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A
Activating and Inverting Routes . .32
Active Route Page . . . . . . . . . . . .32
Alarms Setup . . . . . . . . . . . . . . . .53
Almanac Data . . . . . . . . . . . . . . . .2
Altitude Display . . . . . . . . . . . . . .18
Anchor Drag Alarm . . . . . . . . . . .53
Arrival Alarm . . . . . . . . . . . . . . . .53
B
Backlighting . . . . . . . . . . . . . . . .18
Bearing . . . . . . . . . . . . . . . . . . . . .2
C
CDI Alarm . . . . . . . . . . . . . . . . . .53
CDI Scale Settings . . . . . . . . . . . .49
Cancelling a GOTO . . . . . . . . . . .15
Caution . . . . . . . . . . . . . . . . . . . .iv
Clearing a Cluttered Map Display .15
Compass Page . . . . . . . . . . . . . . .37
Copying and Clearing Routes . . . .31
Course Made Good (CMG) . . . . . .2
Creating and Navigating Routes . .29
Crosstrack Error (XTE) . . . . . . . . .2
D
DGPS Interface . . . . . . . . . . . . . .44
Date and Time Setup . . . . . . . . . .46
Desired Track (DTK) . . . . . . . . . . .2
Differential GPS (DGPS) . . . . . . . . .2
Distance and Sun Calculation . . . .41
E
EZinit Option . . . . . . . . . . . . . . .17
Editing Existing Waypoints . . . . .24
Editing Routes . . . . . . . . . . . . . . .33
Estimated Time Enroute (ETE) . . . .2
Estimated Time of Arrival (ETA) . . .2
G
GPS Antenna . . . . . . . . . . . . . . . .55
Getting Started Tour . . . . . . . . . . .10
Glossary . . . . . . . . . . . . . . . . . . . .2
Going To a Waypoint (GOTO) . . .13
Grid . . . . . . . . . . . . . . . . . . . . . . .3
Ground Speed . . . . . . . . . . . . . . .3
Page 65
APPENDIX E
Index
H
Highway Page . . . . . . . . . . . . . . .36
I
Index . . . . . . . . . . . . . . . . . . . . .65
Initialization Troubleshooting . . . . .7
Initializing . . . . . . . . . . . . . . . . . . .5
Installation . . . . . . . . . . . . . . . . .56
Interface Setup . . . . . . . . . . . . . . .43
L
Latitude . . . . . . . . . . . . . . . . . . . .3
Longitude . . . . . . . . . . . . . . . . . . .3
M
Magnetic Heading Reference . . . . .50
Man Overboard Function . . . . . . .26
Managing/Clearing the Track Log .42
Map Datums . . . . . . . . . . . . .48, 62
Map Page . . . . . . . . . . . . . . . . .9, 38
Map Setup and Orientation . . . . .51
Marking a Waypoint . . . . . . . . . .10
Mark & GOTO Wpts W/Cursor . .40
Marking and Saving Waypoints . .19
Menu Page . . . . . . . . . . . . . . . .9, 41
Message Page . . . . . . . . . . . . . . . .41
Messages & Time Offsets . . . . . . .60
Mounting the GPS 120XL . . . . . .56
N
Navigation . . . . . . . . . . . . . . . . . . .3
Navigation Basics . . . . . . . . . . . . . .4
Navigation Page . . . . . . . . . . . . . . .9
Navigation Setup . . . . . . . . . . . . .48
Navigation Simulator . . . . . . .10, 54
Nearest Waypoints Page . . . . . . . .20
65
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APPENDIX E
Index
O
On-Route GOTOs . . . . . . . . . . . .34
Overview . . . . . . . . . . . . . . . . . . .iii
P
Packing List . . . . . . . . . . . . . . . . .iii
Position . . . . . . . . . . . . . . . . . . . . .3
Position Formats . . . . . . . . . . . . .48
Position Page . . . . . . . . . . . . . .8, 18
Power/Data Cable . . . . . . . . . . . .58
Primary Pages . . . . . . . . . . . . . . . .8
R
Receiver Status and EPE . . . . . . . .17
Reference Waypoints . . . . . . . . . .23
Renaming and Deleting Waypoints 24
Route Definition Page . . . . . . . . . .30
S
Satellite Page . . . . . . . . . . . . . .8, 16
Scanning Waypoints . . . . . . . . . . .25
Screen Backlighting . . . . . . . . . . .18
Screen Contrast . . . . . . . . . . . . . .47
Selecting a GOTO Destination . . .26
Signal Strength Bars . . . . . . . . . . .16
Sky View . . . . . . . . . . . . . . . . . . .16
Speed Filter . . . . . . . . . . . . . . . . .49
System Setup . . . . . . . . . . . . . . . .46
T
Table of Contents . . . . . . . . . . . . . .1
Time Format . . . . . . . . . . . . . . . .47
Tone Setting . . . . . . . . . . . . . . . .47
TracBack . . . . . . . . . . . . . . . .27, 43
TracBack Tips . . . . . . . . . . . . . . .28
Track (TRK) . . . . . . . . . . . . . . . . . .3
Track Criteria . . . . . . . . . . . . . . . .42
Track Log Display . . . . . . . . . . . .52
66
Page 66
Track Log Setup Page . . . . . . . . . .42
Trip Odometer . . . . . . . . . . . . . . .18
U
Units of Measure . . . . . . . . . . . . .49
User-Defined Navigation Pages . . .34
Using the Compass Page . . . . . . .37
Using the Highway Page . . . . . . . .36
Using the Position and Map Pages 11
UTM Coordinates . . . . . . . . . . . . .3
V
Velocity Made Good (VMG) . . . . . .3
W
Warranty . . . . . . . . . . . . . . . . . . .67
Waypoint . . . . . . . . . . . . . . . . . . .3
Waypoint Comments . . . . . . . . . .24
Waypoint Definition Page . . . . . . .22
Waypoint List Page . . . . . . . . . . .21
Waypoint Submenus . . . . . . . . . .20
Wiring & Specifications . . . . . . . .58
Z
Zooming, Panning, and Pointing .39
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LIMITED WARRANTY
GARMIN Corporation warrants this product to be free from
defects in materials and workmanship for one year from the date of
purchase. GARMIN will at its sole option, repair or replace any components which fail in normal use. Such repairs or replacement will
be made at no charge to the customer for parts or labor. The customer is, however, responsible for any transportation costs. This warranty does not cover failures due to abuse, misuse, accident or unauthorized alteration or repairs. GARMIN assumes no responsibility for
special, incidental, punitive or consequential damages, or loss of use.
The warranties and remedies contained herein are exclusive and
in lieu of all other warranties expressed or implied, including any liability arising under 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.
To obtain warranty service, call the GARMIN Customer Service
department (913-397-8200) for a returned merchandise tracking
number. The unit should be securely packaged with the tracking
number clearly marked on the outside of the package, and sent
freight prepaid and insured to a GARMIN warranty service station. A
copy of the original sales receipt is required as the proof of purchase
for warranty repairs. GARMIN retains the exclusive right to repair or
replace the unit or software at its sole discretion.
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®
© 1997 GARMIN Corporation
1200 E. 151st Street, Olathe, KS USA 66062
GARMIN (Europe) Ltd. - Unit 5, The Quadrangle,
Abbey Park, Romsey, UK SO51 9AQ
Part Number 190-00136-00 Rev. B Printed in Taiwan