Owner`s manual | Cisco Systems ASA 5580 Webcam User Manual

GPS 75
Personal
Navigator TM
OWNER'S MANUAL
(Software Version 2.20 or above)
© 1992-1993 GARMIN, 9875 Widmer Road, Lenexa, KS
66215, USA
Printed in Taiwan.
All rights reserved. No part of this manual may be reproduced or
transmitted in any form or by any means, electronic or mechanical,
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 their products and to
make changes in the content without obligation to notify any person or
organization of such changes or improvements.
October, 1993
190-00046-00 Rev. D
PREFACE
GARMIN thanks you for selecting our high performance, full featured
Personal NavigatorTM. The GPS 75 represents our continued commitment
to provide you with a portable navigation unit that is versatile, extremely
accurate, and easy to use. We are confident you will enjoy using your unit
for many years to come.
The GPS 75's rugged construction and quality components offer the
reliability demanded by the harshest operating environments. It may be
used in marine and land vehicles, as well as by hunters, hikers, and
military forces. The unit may be operated portably using its own battery
pack, or it may use a 5-40 volt DC external power source for fixed
mounted applications. You can even use a 115- or 230-volt battery
charger for planning trips at home.
This manual and accompanying quick reference guide provide complete
information on safely operating the GPS 75 to its full potential. A
practice voyage has been planned for you to practice your navigation
skills using the built-in simulator. Afterwards, try a trip of your own to
realize the value of the GPS 75 as your Personal NavigatorTM. If you have
any questions or comments, our Product Support Department is eager to
serve you. GARMIN is fully committed to your satisfaction as a
customer.
GARMIN International, Inc.
9875 Widmer Road
Lenexa, KS 66215
1-800-800-1020
(913) 599-1515
i
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 under development and is subject to changes which could affect
the accuracy and performance of all GPS equipment. Although the GPS
75 is a precision electronic NAVigation AID (NAVAID), any NAVAID can
be misused or misinterpreted, and therefore become unsafe. Use the
GPS 75 at your own risk. To reduce the risk, carefully review and
understand all aspects of this Owner's Manual and thoroughly practice
operation using the simulator mode prior to actual use. When in actual
use, carefully compare indications from the GPS 75 to all available
navigation sources including the information from other NAVAIDs,
visual sightings, charts, etc. For safety, always resolve any discrepancies
before continuing navigation.
NOTE: This device complies with Part 15 of the FCC Rules. Operation
is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
ii
TABLE OF CONTENTS
CHAPTER
1
2
3
INTRODUCING THE GARMIN GPS 75
1-1
1.1 Capabilities
1.2 Operations
1-1
1-2
GETTING STARTED
2-1
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2-1
2-1
2-2
2-2
2-4
2-4
2-5
Front Panel
Softkey Operation
Cursor and Fields
Keypad Operation
Entering Data
Viewing Messages
Operating Modes
BASIC OPERATION
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
4
PAGE
Power On
Satellite Status Pages
Present Position
Waypoints
Waypoint List
Autostore TM
Getting There Fast--GOTO
Navigating To A Waypoint
Man Overboard
Sample Trip
3-1
3-1
3-2
3-3
3-5
3-6
3-6
3-7
3-8
3-11
3-11
ROUTES
4-1
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4-1
4-2
4-3
4-4
4-4
4-5
4-5
Navigating Using Routes
Creating and Copying A Route
Activating Routes
Editing Routes
Deleting Routes
Active Route
Route List
iii
5
6
ADVANCED WAYPOINT FEATURES
5-1
5.1
5.2
5.3
5.4
5-1
5-1
5-2
5-3
Nearest Waypoints
Proximity Waypoints
Reference Waypoints
Waypoint Scanning
AUXILIARY FUNCTIONS
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
Operating Mode and Filters
Plotting Setup
Units/Heading Setup
Alarms and CDI Setup
Date/Time
Audio and Display Setup
Interface Setup
Map Datum Selection
Beacon Receiver Setup
Sunrise/Sunset Planning
Trip & Fuel Planning
Messages
6-1
6-1
6-2
6-3
6-4
6-5
6-6
6-6
6-7
6-8
6-9
6-10
6-11
APPENDICES
A
MESSAGES
A-1
B
GLOSSARY AND NAVIGATION TERMS
B-1
B.1 Definitions
B.2 Course To Steer (CTS)
B-1
B-3
INSTALLATION AND MAINTENANCE
C-1
C
C.1
C.2
C.3
C.4
C.5
C.6
C.7
iv
Specifications
Electrical Wiring
Universal Mount Installation
Universal Mount Operation
Battery Pack Operation
Maintenance
Product Support
C-1
C-3
C-5
C-8
C-10
C-11
C-12
D
MAP DATUMS
D-1
E
LOCAL TIME TO UTC TIME OFFSET
E-1
CHAPTER 2
GETTING STARTED
2.1
FRONT PANEL
Page Options
Page Annunciator
Softkeys
Message Annunciator
PWR
STAT
ABC
1
DEF
2
GHI
3
NAV
GOTO
MOB
JKL
4
MNO
5
PQR
6
WPT
AUTO
STO
STU
7
VWX
8
YZ 9
RTE
CLR
0
ENT
The front panel consists of a 20-key keypad with a 85 x 64-pixel LCD
display. Both the display and keypad may be illuminated for nighttime
operation.
2.2
SOFTKEY OPERATION
Information displayed on the LCD is commonly referred to as a “page.”
The GPS 75 works with softkey operation. At the bottom of the screen
is a list of page options. To select a different page, press the appropriate
softkey below the desired menu option. Please note that the menu
options must be highlighted in order to use the softkeys. On the bottom
line, extreme right, is the page annunciator, which indicates the current
page you are viewing.
2-1
2.3
CURSOR AND FIELDS
Cyclic Field
Confirmation Field
Bar Field
The area of the page which is highlighted in reverse video is called the
cursor. The cursor may be moved to locations on the page called fields
which allow you to enter data or change options. You will encounter five
types of fields.
· Numeric fields accept numbers only.
· Alphanumeric fields accept numbers as well as letters.
· Cyclic fields allow selection from several available options. A
cyclic field is preceded by a prompt ( ). You may cycle through the
choices by pushing CLR.
· Confirmation fields allow you to indicate your approval. For
example, you will be asked to confirm that you want to delete a
waypoint. Confirmation fields always end with a “?” character.
Press ENT to approve the confirmation field.
· Bar fields allow an adjustable scale entry with the length of the
bar representing the minimum to maximum setting. Use your
arrow keys to make adjustments in bar fields.
2.4
KEYPAD OPERATION
The PWR/STAT key is a dual function key that controls unit
power and system status. Pressing this when the unit is off will
turn the unit on. To turn the unit off, press and hold PWR/STAT
until the display is blank.
Pressing PWR/STAT momentarily while the unit is on will take
you to the status pages (see Section 3.2). If the message
annunciator is flashing and the tone sounds, you may push
PWR/STAT to view the message.
2-2
Pressing GOTO/MOB once allows you to initiate the GOTO
function, setting an instantaneous course to any waypoint
(see Section 3.7). Pressing GOTO/MOB twice allows you to
initiate the Man Overboard function, setting an immediate
course to the captured position (see Section 3.9).
Pressing AUTOSTORE allows you to capture your present
position instantaneously (see Section 3.6).
Pressing NAV selects the Navigation Pages which allow you
to view navigation information and the Plot Page (see Section
3.8).
Pressing WPT selects the Waypoint Pages which allow you
to create, edit, delete, and rename waypoints. In addition,
you may view nearest waypoints or proximity waypoints
(see Sections 3.4, 3.5 and Chapter 5).
Pressing RTE selects the Route Pages which allow you to
edit, review, activate, and delete routes (see Chapter 4).
Pressing either of the arrow keys allows you to move
the cursor, scroll through information lists, and enter
letters of the alphabet.
The alphanumeric keys allow you to enter letters and
numbers. Use the arrow keys to select the desired
letter or number.
Pressing this key while the cursor is not on a numeric or
alphanumeric field allows you to change the backlight level.
There are two backlighting levels.
Pressing CLR erases information in the cursor field. If the
cursor is over a cyclic field, pressing CLR will toggle through
several available options.
Pressing ENT confirms an entry or selection.
2-3
2.5
ENTERING DATA
To enter data you must first move the cursor under the desired field by
pressing the right or left arrow key.
To enter a number...
· Press the key that is labeled with the desired number. The
numbers will fill in from the right side of the field and move to the
left as each new number is entered. For example, if you wish to
enter “51” in a three space field, you must press the 5 and 1 keys
in that order.
· Press CLR if you enter an incorrect number.
· Press ENT when you have filled all significant digits of the field
with numbers.
To enter a letter...
· Press the key that is labeled with the desired letter.
· Press the right or left arrow key until the desired letter is displayed.
· Press CLR if you enter an incorrect letter.
· Press ENT when all the characters are entered.
The GPS 75 features a keypad feedback tone which will sound each time
you press a key. If you enter data which is not appropriate for the field,
the feedback tone will quickly sound three times indicating an error. The
keypad feedback tone can be turned off if you wish (see Section 6.6).
2.6
VIEWING MESSAGES
From time to time, the GPS 75 will use a message to tell you of conditions
needing attention. When the GPS 75 has a new message, the MSG
annunciator will flash. When this occurs, press PWR/STAT to view the
new message(s). Press PWR/STAT again to see the page you were
viewing prior to reading your message.
While the MSG annunciator is flashing, the GPS 75 will also generate a
tone to alert you of the message (if your unit is connected to an external
alarm, it will also be activated). Messages that demand immediate
attention such as an arrival alarm generate a quick tone that will not stop
until you view the message. All other messages generate a slow tone that
will cease after 15 seconds. The message tone may be turned off if you
2-4
wish (see Section 6.6).
Important messages will remain on the Message Page after being
viewed. If this occurs, the MSG annunciator will be in view but will not
flash (if no messages exist, the MSG annunciator will not be visible). To
review these messages, press PWR/STAT to reveal the status menu
options. Then press the key underneath the “AUX” page option. With
the arrow keys, scroll to “Messages” and press ENT.
Refer to Appendix A for a complete list of GPS 75 messages.
2.7
OPERATING MODES
Three modes are available which will allow you to operate your GPS 75
in the way which best suits your needs (see Section 6.1).
Normal mode is most suitable for high dynamics applications. The GPS
75 will typically operate up to 5 hours on a single pack of alkaline
batteries, or 6 hours using the rechargeable battery pack.
Battery Saver mode is suitable for most applications and will extend
the battery life to 7 hours on a single pack of alkaline batteries, or 9 hours
using the rechargeable battery pack.
Simulator mode allows you to simulate the operation of the GPS 75
while at home or in your office. The simulator mode can be used while
learning to use your GPS 75 and is ideal for planning routes and entering
waypoints. Keep in mind that the GPS 75 is not tracking satellites in the
simulator mode. YOU SHOULD NEVER ATTEMPT TO USE THE
SIMULATOR MODE FOR ACTUAL NAVIGATION.
If you are using your GPS 75 for the first time, you are encouraged to
review Chapter 3 which introduces the GPS 75's basic features, and
Chapter 6 on custom setups. Afterward, you may want to read through
the rest of this manual and make further use of the built-in simulator to
practice with the advanced features.
2-5
CHAPTER 3
BASIC OPERATION
3.1
POWER ON
After you turn your GPS 75 on, it will conduct a series of self tests and
display the following notice:
Following completion of the tests, the Satellite Bar Graph Page (see
Section 3.2) will be displayed, and the GPS 75 will begin acquiring
satellites.
After a position is found (and if no keys have been pressed), the Position
Page (see Section 3.3) will be displayed, and the unit is ready for normal
operation.
When four or more satellites with good geometry are available, the GPS
75 will automatically operate in the 3D mode in which latitude, longitude,
and altitude are computed. If only three satellites are available, the unit
will operate in 2D mode in which only latitude and longitude are
computed. When operating in the 2D mode, the unit will use the last
computed altitude or your last entered altitude. (Section 3.3 describes
how you may enter the altitude.)
Your GPS 75 will automatically update satellite orbital data as it
operates. If you have not operated your unit for a period of six months
or longer, it will take approximately 15 minutes to search the sky and
collect new orbital data. You will be informed when your unit is
searching the sky with the message “Searching the Sky.”
Once satellite
orbital data is collected, it will be stored in memory. The memory is
maintained by an internal battery, therefore the data will not be lost
when you turn your GPS 75 off.
3-1
3.2 SATELLITE STATUS PAGES
There are four status pages available by pressing PWR/STAT. Three
pages display satellite tracking status, and the fourth is a menu of
auxiliary functions (messages, setups, and utilities). The softkeys at the
bottom of each page allow selecting pages: BAR (bar graph), STAT
(status), SKY (skyview), and AUX (auxiliary menu). You may also cycle
through these pages by repeatedly pressing PWR/STAT.
Satellite Bar Graph
* To view the
Satellite Status
Page, press
softkey
underneath the
STAT banner.
The Satellite Bar Graph shows the
signal quality of each visible satellite
graphically. The receiver status is
also shown at the top of the screen.
In this example, the unit is
simulating navigation. The satellite
numbers (1-32) are represented
along the bottom of the graph; signal
quality (1, weakest to 9, strongest) is
represented along the side. If a
satellite is visible but not tracked,
the signal quality will be blank.
If
differential corrections are available
for a satellite, a “D” will appear at
the bottom of the signed strength
bar for that satellite. (See Section
6.7 for DGPS setup instructions.)
Satellite Status Page
* Press SKY Softkey
To display
Satellite Skyview.
3-2
The Satellite Status Page shows the
ID, azimuth, elevation, and signal
quality of each visible satellite in a
table format. The receiver status,
again, is displayed at the top of the
screen, as well as the dilution of
precision (DOP) and estimated
position error (EPE). (For more
information about unfamiliar terms,
see Appendix B.)
Satellite
* Press AUX
Softkey to
display the
Auxiliary Menu
Page.
Skyview
The Satellite Skyview Page shows
the azimuth and elevation of each
visible satellite in a graphic skyview
format. Additionally, the DOP and
EPE are displayed. The azimuth
and elevation are useful in
determining whether a satellite
signal is blocked by buildings,
mountains, or other obstructions. If
a satellite is not currently being
tracked, it will be displayed in
reverse video on the screen
Auxiliary Menu
The Auxiliary Menu Page enables
the selection of various setup and
utility functions by moving the cursor
to an item with the arrow keys and
pressing ENT. Each setup and utility
page is described in detail in Chapter
6.
3.3
PRESENT POSITION
Position
Page
As mentioned earlier, the Position
Page is automatically displayed once
a position is obtained. This page
displays track, ground speed,
latitude and longitude relative to
the selected map datum (see Section
6.8), as well as a choice of altitude
above mean sea level (MSL) or time
(cyclic field).
(Note:
Time
information will not be displayed
when the GPS 75 is acquiring
satellites.)
3-3
When the GPS 75 is performing 2D navigation, the last known altitude
will be used in the latitude/longitude computation. If the altitude is not
accurate within a few hundred feet, you should manually enter your
altitude.
To enter the altitude (2D only)...
· Use an arrow key to move the cursor under the altitude.
· Enter the altitude. If your antenna is mounted on a high mast,
make sure you add the mast height. (Remember to complete the
data entry by pressing ENT.)
During initial satellite acquisition, the displayed position is the last
computed position stored in the GPS 75. If your position has moved
several hundred miles or more with the power off, the unit may go into
the Autolocate mode. This process can take up to ten minutes.
Alternatively, you may enter a more accurate initial position to speed up
the acquisition process. (You may also change the position at any time
while you are in simulator mode.)
To enter the latitude/longitude...
· Use an arrow key to place the cursor on the latitude hemispheric
designation (far left).
· Check the hemispheric designation (“N” or “S”) of the latitude. If
it is correct, go to the next step. If it is incorrect, press CLR until
the correct hemispheric designation is displayed.
· Place the cursor on the latitude field and enter the latitude.
Depending on the position format selected (see Section 6.3), you
will enter the latitude in one field (degrees only), two fields
(degrees/minutes), or three fields (degrees/minutes/seconds or
UTM). You must press ENT for each field to confirm the data
entry.
· Check the hemispheric designation (“E” or “W”) of the longitude in
the same manner as above for latitude.
· Enter the longitude (remember to complete the data entry by
pressing ENT).
3-4
3.4 WAYPOINTS
The GPS 75 allows you to create, store, and use 250 alphanumeric
waypoints. A waypoint consists of a name (up to six letters and/or
numbers), its latitude/longitude location, last time/date of modification,
and a one-line comment. There are four waypoint pages. The softkeys
at the bottom of each page allow the selection of each page: WPT
(waypoint definition), NRST (nearest waypoints), PROX (proximity
waypoints), and LIST (waypoint list). To start the waypoint pages, press
WPT. The Nearest and Proximity Waypoint Pages are covered in
Chapter 5.
Waypoint
Definition
If you are not already on this page,
press the WPT softkey. It allows you
to review, create and modify
waypoints. The cyclic field allows
you to display one of the following: 1)
the date and time the waypoint
location was last modified, 2) a oneline comment of the waypoint (up to
20 characters), or 3) range and
bearing from a reference waypoint.
To create, modify or review a waypoint
· Move the cursor to the waypoint name field, then enter the desired
waypoint name.
· To create or modify position, enter the waypoint latitude and
longitude as described in Section 3.3 on the previous page. (NOTE:
If a waypoint is being used for navigation, its position cannot be
modified. An attempt to modify the position of such a waypoint
will result in the message “Can't Chg Activ WPT.”)
3-5
3.5WAYPOINT LIST
The Waypoint List Page allows viewing of the stored waypoints in the
unit. The list may be scrolled, with the arrow keys, to view all the
waypoints. From this page, waypoints may be selected for deletion,
renaming, or to activate a direct GOTO. (See Section 3.7.)
To delete a waypoint...
· With the arrow keys, place the
cursor on the desired waypoint.
· Press CLR and ENT.
· The
Confirmation
Page
is
displayed. Press ENT to confirm
or CLR to cancel.
NOTE: If you attempt to delete a proximity or route waypoint, a message
will be displayed. You must delete the proximity alarm or the route
before you can delete the waypoint.
To rename a waypoint...
· With the arrow keys, place the cursor on the desired waypoint.
· Type in a new name for the waypoint and press ENT.
· The Confirmation Page is displayed.
name change or CLR to cancel.
Press ENT to confirm the
To delete all waypoints...
· With the arrow keys, place the cursor over the “Delete All?” field
and press ENT.
· The Confirmation Page is displayed. Press ENT to confirm the
deletion of all waypoints or CLR to cancel.
NOTE: The “Delete All?” selection will delete all routes and proximity
waypoints as well.
3.6AUTOSTORE
TM
function allows you to capture your position at the
The AutoStore
touch of a button for future reference. This function saves your current
position in a waypoint. Additionally, you may record your navigation
path by inserting the captured waypoints into a route (see Section 4.6).
3-6
The AutoStoreTM Page displays the waypoint name, captured position,
TM
and optional storage route. An AutoStore waypoint name is preassigned as a three digit number. You may change this to any name you
desire.
AutostoreTM waypoints may be used for any waypoint operation
and will be part of the 250 available waypoints.
Waypoint Name
Longitude
Latitude
To capture present position...
Route Storage
Number
· Press AUTOSTO. The pre-assigned waypoint name is on line 1.
NOTE: The AutoStoreTM location is captured as soon as you press
AUTOSTO. This allows you all the time you need to change the
waypoint name and/or confirm the Autostore.
· If you wish to give the waypoint a different name, move the cursor
to the waypoint name field and enter the name of your choice. If
you enter a waypoint name already used, you will be informed with
the message, “WPT Exists [name].” Enter a different name if this
occurs. Press ENT.
· Press ENT on a blank route storage number field to save the
waypoint. If the route storage number field is not blank, the
waypoint will be added to the route shown. (In Chapter 4, we will
discuss building a route with AutoStore.)
3.7GETTING THERE FAST--GOTO
The GOTO function allows you to quickly set a course from your position
to any waypoint.
3-7
To activate the GOTO function...
· Press GOTO. The above page will be displayed with the cursor on
the GOTO waypoint field. If the GPS 75 is currently navigating to
a waypoint, that waypoint will be offered as the default GOTO
waypoint. If the waypoint field is blank or the waypoint shown is
not the desired destination, type the new name right over the old
name. NOTE: If a non-existent waypoint name is entered, the
Waypoint Definition Page will appear to give you the opportunity
to create the waypoint (see Section 3.4).
· Confirm the default GOTO waypoint by pressing the ENT key.
The NAV Page will be displayed. (The D-Bar on the CDI will be recentered at this point, see Section 3.8 below.)
Alternatively, the GOTO function may be quickly activated from many
pages (e.g. the Nearest Waypoint Page or the Waypoint List) by placing
the cursor over the desired waypoint name and pressing the GOTO key.
The GOTO Page will be displayed with the cursor on the GOTO waypoint
name. The GOTO function will be activated when the ENT key is
pressed.
To cancel the GOTO function...
· Press GOTO.
· Press CLR.
The GOTO waypoint name will become blank.
· Press ENT. The GPS 75 will start to navigate using the active
route, if it has been programmed (see Chapter 4). Otherwise, the
GPS 75 will stop computing waypoint navigation data.
3.8NAVIGATING TO A WAYPOINT
There are four navigation pages available from the NAV key. You may
cycle through the following with softkeys at the bottom of each page:
NAV (navigation summary), CDI (graphic course deviation indicator),
PLOT (graphic plotter), and POSN (Present Position Page).
Active Leg
Cyclic Fields
D-Bar
Relative
Bearing Pointer
3-8
Cyclic Fields
Scale Setting
Course Deviation
Indicator (CDI)
Navigation
Summary
The Navigation Summary Page displays direction, distance and speed
information to direct you along a route or a GOTO destination. The
active leg (route) waypoints or GOTO waypoint is shown at the top of the
screen. The CDI is at the bottom of the page. Current CDI scale setting
is shown at each end of the scale. This is replaced by the cross track
distance if the D-Bar goes off the scale. A relative bearing pointer at the
center of the CDI indicates the bearing to the waypoint relative to the
current track (TRK).
Notice that this page has four cyclic
fields available. The field options
are as follows:
Field #1 (top left) provides a choice
of: (a) bearing to destination
waypoint (BRG), (b) course to steer
(CTS), (c) desired track (DTK), (d)
ground track (TRK), or (e) turn
(TRN).
* Press the softkey
under CDI.
Field #2 (top right) provides a choice
of: (a) range to destination waypoint
(RNG), (b) cross track error (XTK),
(c) along track distance (ATD), or (d)
distance made good, back to starting
point (DMG).
Field #3 (bottom left) provides a choice of: (a) ground track (TRK), (b)
course made good (CMG), or (c) ground speed (GS).
Field #4 (bottom right) provides a choice of: (a) ground speed (GS), (b)
estimated time enroute (ETE), (c) estimated time of arrival (ETA), or (d)
velocity made good (VMG). (See Appendix B for a description of
navigation terms.)
Course Deviation Indicator
* Press the softkey
under PLOT.
The CDI Page shows a graphic
“highway” display.
The active
waypoint is shown at the top of the
screen. Navigation values for Track
(TRK), Ground Speed (GS), Bearing
(BRG), Range (RNG), and Estimated
Time Enroute (bottom right) are
shown.
The center-line of the
highway represents the desired
3-9
track. The outer lines give a perspective view of the distance to a
waypoint. As the waypoint comes into range, it will be displayed and the
outer lines will become parallel.
Plot Page
The Plot Page shows a graphic top
view of your course. The destination
waypoint is shown at the top right of
the screen. Your present position is
shown as a plus (“+”) sign in the
middle of the page. The track history
and/or the active route are shown as
· Press the POSN
a solid line. (Plotting of ground
softkey .
track and active route is userselectable, see Section 6.2.) Nearby
waypoints
are
displayed
as
diamonds.
You may view the
waypoint name by scrolling to the point with the arrow keys. A GOTO
may be performed by pressing GOTO while the cursor is on the waypoint.
The scale distance for the screen (distance represented by height of
screen) is at the lower left corner of the screen. The scale number
(directly above the scale distance) may be changed by moving the cursor
to the scale number and pressing CLR, or by entering a new number (09). Finally, the Plot Page can be oriented as a “North up”, “Ground Track
Up”, or “Desired Track Up” display (see Section 6.2).
Position
Page
The Position Page is described in
Section 3.3. Please refer to that
section for further information.
3-10
3.9MAN OVERBOARD
The Man Overboard function allows you to set an instantaneous course
to a captured position, providing rapid response to an emergency
situation.
To activate the Man Overboard function...
· Press MOB twice. The above page will be displayed and the
present position will be captured in a waypoint named, “MOB.”
· Press ENT to navigate to the Man Overboard waypoint. A
navigation page will be displayed; select the desired page with the
softkeys.
3.10 SAMPLE TRIP
Now that you have gained a basic understanding of the GPS 75, you are
ready to embark on a sample trip.
Your GPS 75 is factory initialized with a position of N39°, W095°. A
waypoint named GARMIN, located at GARMIN's Lenexa, Kansas facility,
is also provided.
Just for fun, let's go to GARMIN! Turn on your GPS 75. The power on
notices will be displayed followed by the Satellite Bar Graph. The GPS
75 is ready to accept your commands.
3-11
Select the simulator mode...
· Press PWR/STAT to select a Status
Page.
· If the Auxiliary Page is not
displayed, press the softkey
underneath the AUX banner to
select it.
· Use the right arrow key to
highlight “Op Mode”, press ENT.
ENT
· If the operating mode field does
not already display “Simulator”,
move the cursor with the arrow
keys to that field, and press CLR
until it does, followed by ENT.
The unit is now ready to start the
simulation.
Check the present position...
NAV
* Plus
3-12
POSN Softkey if needed
· Press NAV to display a navigation
page.
· If the Present Position Page is not
displayed, press the POSN softkey
to select it. Note the present
position. We will change the
position to N39° W95°. (If the unit
is set to display UTM coordinates,
refer to Section 6.3 to change the
coordinates to latitude and
longitude.)
· Move the cursor to the latitude hemispheric designator with the
arrow keys. Press CLR if you need to change this designator from
“S” to “N”. Press ENT.
· With the cursor on the latitude degrees, press “3” and “9”, then
ENT. (You may need to enter “0” for minutes and/or seconds to
clear these fields, if they are shown.)
· Move the cursor to the longitude hemispheric designator. Follow
the same sequence as above to complete longitude entry.
NOTE: The sample illustrations in this section assume that the factory
default settings, including the selection of nautical units (knots, nautical
miles), have not been changed. If these settings have been changed, the
unit may display slightly different data than presented here. Changing
the unit set-ups is covered later in Chapter 6.
Check the GARMIN waypoint...
WPT
*Plus LIST softkey if needed
WPT
· To verify that the “GARMIN”
waypoint is in memory, press WPT
to select a waypoint page.
· If the Waypoint List Page is not
displayed, press the LIST softkey
to select it.
Verify that the
waypoint, “GARMIN”, is on the
list. If it is, you may skip the next
three steps.
NOTE:
If the
Waypoint List Page is full, use the
arrow keys to scroll through the
rest of the list until you locate the
“GARMIN” waypoint.
· If the “GARMIN” waypoint is not
listed, you must add it to the GPS
75's memory before you can
activate the GOTO function. Press
the WPT softkey.
· Move the cursor over the waypoint
name field with the arrow keys.
Enter “G”, “A”, “R”, “M”, “I”, “N”.
Press ENT. Remember to use the
arrow keys to select the letter you
3-13
want (e.g., to get the letter “G”, press the “3” key and then the left
arrow).
· Enter the coordinates for the “GARMIN” waypoint using the same
method described for setting the present position (see Section 3.3).
Note, however, that depending on the unit setups, Lat/Lon
coordinates will be entered in one (degrees only), two (degrees/
minutes) or three (degrees/minutes/seconds) fields. These setups
are covered later in Chapter 6. Refer to the table below for the
proper location numbers to enter:
Setup
Latitude
Degrees Only
N38.94992°
Longitude
W94.74638°
Degrees/Minutes N38° 56.995’
W94° 44.782’
Degrees/Min/Sec
W94° 44’ 46.9”
N38° 56’ 59.7”
· With the coordinates entered, you are ready to proceed with the
GOTO function.
GOTO GARMIN...
GOTO
MOB
· Press GOTO/MOB. The GOTO
Page is displayed with the cursor
under the GOTO waypoint name.
· Enter
the
waypoint
name,
“GARMIN” with the alphanumeric
keys and the arrow keys. Press
ENT.
Enter
“GARMIN”
with
· A navigation
displayed.
page
is
then
alphanumeric and arrow keys.
ENT
*Plus NAV softkey if needed
3-14
· If the Navigation Summary Page
is not shown, select it with the
NAV softkey.
A Faster GOTO...
At this point, we will take a very brief detour. You may recall from
Section 3.7 that there is an alternative to typing all those letters in. Let's
try it.
· First we must cancel the existing GOTO by pressing GOTO/MOB,
CLR, and ENT. This calls up the GOTO Page, clears the destination
and then confirms that no GOTO destination is desired.
· Select the Waypoint List Page by
pressing WPT and then the LIST
softkey, if needed.
· With the right arrow key, move
the cursor to the GARMIN
waypoint.
GOTO
MOB
· Press GOTO/MOB. The waypoint
“GARMIN” is automatically
carried over to the GOTO Page.
(You can “import” waypoints to
the GOTO Page from several other
pages, including the Nearest
Waypoint Page and the Plot Page,
simply by highlighting the desired
waypoint.)
ENT
· Press ENT.
A navigation page is
3-15
then displayed.
· Select the NAV Summary Page
with the NAV softkey. Now back
to our trip.
Set the Simulation Speed...
· With the arrow keys move the
cursor to the ground speed field.
(If this field does not currently
indicate “GS”, for ground speed,
highlight that field with the left
arrow key and press CLR until it
does.)
ABC
1
MNO
5
ENT
· Enter a ground speed of 15 knots
by pressing “1”, “5”, and ENT. (The
GPS 75 will accept speeds of up to
90 knots.) The simulation speed is
now set and the GPS 75 is
simulating a trip from coordinates
N39° W95° to the “GARMIN”
waypoint (our Lenexa, KS facility).
Examine the Navigation Information...
At this point, you can explore the capabilities of the GPS 75. While you
are on the Navigation Summary Page, you may want to examine other
information not currently displayed (see Section 3.8).
· As the unit is navigating, you will notice the Range (RNG) to
GARMIN decreasing. If you wish to see the distance back to where
you started from, highlight this field (top right) with the arrow
keys, and press CLR until distance made good (DMG) is displayed.
· Highlight the ground speed (GS) field (bottom right) and press
3-16
CLR until the estimated time enroute (ETE) is displayed.
· Highlight the ground track (TRK) field (bottom left) and press CLR
until groundspeed (GS) is displayed.
· Highlight the bearing (BRG) field (top left) and press CLR until
ground track (TRK) is displayed.
You now have an entirely different Navigation Summary Page that
should look something like this:
Let's Look at a Different Navigation Page...
· Move the cursor to the page options
with the arrow keys.
· Select the Graphic CDI Page with
the CDI softkey, (the “3” key in
this case).
3
· The Graphic CDI Page shows the
“highway” display.
Note the
ground track (TRK), destination
waypoint, and ground speed (GS),
on the top line. On the bottom line,
bearing (BRG), range (RNG), and
estimated time enroute (ETE), are
displayed.
2
3-17
Our Next Stop,
Position Page...
CLR
the
Present
· Select the Present Position Page
with the POSN softkey. Note that
ground track (TRK) and ground
speed (GS) are shown on the top
line, followed by the current
latitude and longitude on the next
two lines.
· Highlight the cyclic field at the
bottom of the page and toggle
between current time and altitude
with CLR.
The Plot Page (last one)...
· Move the cursor to the page options
with the arrow keys.
· Select the Plot Page with the PLOT
softkey.
1
The Plot Page will plot your ground
track and/or an active route. (The
setups for this page are covered in
Section 6.2.) The top left corner
indicates a “Track Up” display. A
“North Up” display would be shown
as “000” and a “Desired Track Up”
display is also available. The top
right corner shows the destination
waypoint.
3-18
The scale setting is shown in the
bottom left corner.
· Highlight the scale setting field
with the arrow keys and change
the scale setting with CLR. You
may also change the scale settings
with the number keys (0-9).
Finally, you may identify waypoint
shown on the Plot Page.
· Select a scale setting that allows
you to see the destination waypoint
(GARMIN).
· With the arrow keys, highlight the
waypoint shown on the Plot Map.
Once highlighted, the waypoint
name is shown.
CLR
Experiment with your GPS 75.
You are on your way to mastering the GPS 75. If you let the simulator
run, you will eventually get a message, “Approaching GARMIN”, just
prior to reaching the waypoint. Press PWR/STAT to view the message;
and again to return to the Plot Page.
You may also want to:
· Press NAV, WPT, GOTO, or any other key to become more familiar
with the available pages.
· Practice using the softkeys and cyclic fields to display new
information.
· Change the simulation speed (faster or slower).
· Read Chapter 6 on Unit Customization and set up the unit to your
preference.
· Stop the simulation. You can stop the simulation by turning the
unit off (press and hold PWR/STAT), or go to the “OP Mode” set up
and change to the “Normal” or “Battery Saver” modes (see Section
6.1).
3-19
There are 3 route pages in the GPS 75. The softkeys at the bottom of each
page allow cycling through each page: RTE (route definition), ACTV
(active route), and LIST (route list).
4.2CREATING AND COPYING A ROUTE
The Route Definition page allows you to create, change, review, copy, and
activate routes. Remember that route 0 is always the active route. If you
create a route in route 0, you should copy it into an empty storage route
(1-9). When you activate a storage route 1-9, it will be copied to route 0
for activation.
Route
Definition
Route # Field
Route Action Field
Desired
Track
Waypoint List
Leg Distance
Press the RTE key. If you are not already on the Route Definition Page,
press the RTE softkey. On the route number field, you may choose
between routes 0 through 9 with CLR. Next to this is another cyclic field
which allows you to activate the route, clear the route, copy the route to
another location, or invert the order of the waypoints in a route and
activate it. The arrow keys allow you to scroll through the list of
waypoints in a route.
To Create a Route...
· Move the cursor to the route
number field and press CLR until
you find an empty route.
· Scroll to the first blank waypoint
name field and type in a waypoint
you wish to put in the route.
· Press ENT.
· Repeat this process for each
waypoint you want to add, up to a
total of 20.
4-2
To copy a route...
· Select the Route Definition Page
(RTE).
· Highlight the route number field
and select the route number to
copy from with CLR.
· Highlight the route action field
with the arrow keys and press
CLR until “ > Copy To>” is
displayed.
· A third field now appears in the top right corner. Highlight this
field and select the destination route number with CLR.
· Press ENT.
The route is now copied.
4.3ACTIVATING ROUTES
Routes are activated on the Route Definition Page also. You may
activate any route in the displayed order, or in reverse order. (NOTE:
Remember, when a new route is activated, the previous contents of route
0 will be overwritten. If you wish to save route 0, be sure to copy it to an
empty route first.)
To activate a route...
· Select the Route Definition Page
(RTE).
· Highlight the route number field
and select the route number to
activate with CLR.
· Highlight the route action field,
and with CLR select “>Activate?”.
· Press ENT to activate the route.
To invert a route...
· Follow the same steps as above for
activating a route, but select,
“>Invert?” at the route action field.
· Press ENT to activate the route in
an inverted order.
4-3
4.4EDITING ROUTES
To Edit an Existing Route...
· Select the Route Definition Page
(RTE).
· Highlight the route number field
and select the route you wish to
edit.
· To insert a waypoint into the route,
highlight the waypoint you want
to place the new waypoint in front
of. Type in the new waypoint name.
Press ENT. The new waypoint is
added to the route.
· To delete a waypoint from the
route, highlight the waypoint you
wish to delete. Press CLR and
ENT.
· If you attempt to add a waypoint to a route that already contains
20 waypoints, you will be informed with the message, “Route is
Full”.
NOTE: You may also edit a route from the Active Route Page (see Section
4.6).
4.5DELETING ROUTES
You may delete an unwanted route from the Route Definition Page.
To delete a route...
· Highlight the route number field
and select the route you wish to
delete with CLR.
· Highlight the route action field
and select “>Clear?” with the CLR
key.
· Press ENT to delete the route.
4-4
4.6ACTIVE ROUTE
Active Leg
Range
Waypoint List
Cyclic Column:
- ETE
- ETA
- DTK
The Active Route Page displays the waypoints of the active route
starting with the “active from” and “active to” waypoints on the top line.
Press the ACTV softkey to select this page.
The Waypoint List displays route waypoints starting with the “active to”
waypoint. For each waypoint, additional information is available. The
first column displays Range (RNG). The second column is a cyclic field
that displays Estimated Time Enroute (ETE, in hours/minutes or minutes/
seconds, as appropriate), Estimated Time of Arrival (ETA), or Desired
Track (DTK). You may scroll through the waypoint list with the arrow
keys.
To edit the active route...
· To insert a waypoint, highlight the waypoint you want to place the
new waypoint in front of. Type in the new waypoint name. Press
ENT. The new waypoint is added to the route.
· To delete a waypoint, highlight the waypoint you wish to delete.
Press CLR and ENT.
4.7ROUTE LIST
The Route List Page displays a list of all routes currently stored in
memory. Press the LIST softkey to select this page. The Route List Page
displays the route numbers (far left), beginning waypoint, and final
destination waypoint. You may also activate or delete a route from the
Route List Page.
4-5
To Activate a Route...
· Highlight the route you wish to
activate with the arrow keys.
· Press ENT. The Route Definition
Page is displayed with the
“>Activate?” action highlighted.
· Press ENT to Activate the route.
To Delete a Route...
· Highlight the route you wish to delete with the arrow keys. Press
CLR. The Route Definition Page is displayed with the “>Clear?”
action highlighted.
· Press ENT to delete the route.
Building Routes with AutoStore...
The GPS 75's AutoStoreTM feature is the quickest and easiest way to build
a route as you go. With autostore, each time you turn on a new track, pass
a significant landmark, or reach some location of interest, you can save
the location and create a route at the same time. Each autostore
waypoint can be added to the same route as you are traveling.
· With the unit operating in 2D or
3D Navigation mode, press the
AUTOSTO key to save your
starting location.
· At this point, you may change the
AutoStore name, if you wish (see
Section 3.6).
· Select an empty route to store the waypoint by highlighting the
“Append to Route >_?” field and pressing CLR until the desired
route number is displayed.
· Press ENT to add the waypoint to the selected route.
· Repeat these steps each time you arrive at a location you wish to
add to the route, up to a total of 20 waypoints per route.
4-6
CHAPTER 5
ADVANCED WAYPOINT FEATURES
5.1NEAREST WAYPOINTS
An important feature of the GPS 75 is the ability to display up to nine
nearest waypoints, within 100 nautical miles of your present position. In
an emergency, you may use the nearest waypoint feature to find the
closest point of safety in your area. As was discussed in Section 3.4, you
may access the waypoint pages by pressing the WPT key.
If the Nearest Waypoint Page is not
currently displayed, press the NRST
softkey. This page displays the
waypoint names including bearing
and range from present position. You
can scroll through the waypoints
listed by using the arrow keys.
To GOTO a Nearest Waypoint...
· Move the cursor to the desired waypoint name with the arrow keys.
· Press GOTO and ENT.
5.2PROXIMITY WAYPOINTS
The Proximity Waypoint Page allows you to define an alarm circle
around a waypoint. This feature is useful in defining an area around a
rock, reef, or restricted waters. When you approach one of these
waypoints, the GPS 75 will notify you with an alarm tone and the
message, “Prox Alarm-[waypoint name],” if you enter the alarm circle.
The GPS 75 allows you to define a
maximum
of
nine
proximity
waypoints.
Scroll through the
proximity waypoint list using the
arrow keys.
5-1
To set a proximity waypoint...
· Select the Proximity Waypoint Page with the PROX softkey.
· Select a blank waypoint name field with the arrow keys.
· Enter the waypoint name. (NOTE: If neither the waypoint name
nor the location exists in memory, the Waypoint Definition Page
will be displayed. You must then enter the waypoint location. See
Section 3.4 to create a waypoint.)
· Press ENT.
· Enter the proximity alarm distance.
· Press ENT to enable proximity alarm.
If the newly created proximity alarm circle overlaps with an existing
proximity alarm circle, you will be informed of the overlap with the
message “Proximity Overlap”. As long as the overlap remains, this
message will be displayed each time the GPS 75 is turned on. (WARNING:
If you enter the overlap area, the unit will only inform you of the nearest
waypoint.)
5.3REFERENCE WAYPOINTS
In section 3.4, we discussed creation of waypoints by entering the
latitude and longitude position. Another way to create a waypoint is by
referencing an existing waypoint. By indicating the bearing and range
from a reference waypoint, the GPS 75 is able to compute a latitude and
longitude location for the new waypoint.
To
create
a
waypoint
referencing another...
by
· Select the Waypoint Definition
Page with the WPT softkey.
· Highlight the WPT name field and
enter the new waypoint name.
· Press ENT.
· Highlight the “>Ref:” field and enter the existing waypoint that
will be used as reference. (If the reference field is not currently
shown, highlight that cyclic field and press CLR until it is displayed.)
· Press ENT.
5-2
· Enter the bearing and distance from the existing waypoint to the
new waypoint.
· Press ENT. A latitude and longitude location for the new waypoint
should now be displayed.
5.4WAYPOINT SCANNING
Throughout this manual, each time we have encountered a waypoint
name field, we have entered the waypoint name with the alphanumeric
keys. An alternative is to use the waypoint scanning feature.
To Scan for a Waypoint...
· As an example, use the GOTO
waypoint field. Press GOTO.
· The waypoint name field is
highlighted and may be blank or
may already show a GOTO
destination. If the waypoint name
field is not blank, press CLR.
· Press WPT.
A waypoint name is now displayed.
· Scan for the desired waypoint with the arrow keys. (NOTE: As you
are scanning, up to nine nearest waypoints will be shown first;
followed by the entire list in numeric and alphabetical order.)
To limit the scanning range, you may specify the first letter(s) or
number(s) of the waypoint name.
To Perform a Limited Scan...
· For this example, select the
Waypoint Definition Page with
WPT and the WPT softkey, if
needed.
· Highlight the waypoint name field
with the arrow keys.
· If this field is not blank, press
CLR.
· Enter the first character of the waypoint name.
enter the letter “G”.
For this example,
· Press WPT. Use the arrow keys to scan through all waypoints that
begin with the letter “G”.
5-3
CHAPTER 6
AUXILIARY FUNCTIONS
The GPS 75's auxiliary pages allow you to do utility and setup functions
to customize your unit. The 11 auxiliary pages are accessible from the
auxiliary menu (see Section 3.2) by highlighting the page you want and
pressing ENT. The softkeys allow changing to previous (PREV) and next
(NEXT) pages. The AUX softkey takes you back to the Auxiliary Menu
Page.
6.1OPERATING MODE AND FILTERS
From this page, you may change
between various operating modes
by highlighting the “OPERATING
MODE” field and pressing CLR. You
may select simulator mode, normal
mode, or battery saver mode. (See
Section 2.7 for a description of each
mode.)
Also from this page, the position and velocity filters may be changed.
Changing the filter settings will alter the GPS 75's response time to
changes in track or ground speed. To change the filter settings, highlight
the appropriate field and cycle through the filter settings (automatic,
fast, medium, and slow) with CLR. The “Fast” setting will provide
instantaneous response (three seconds maximum response time) to
changing conditions. The “Medium” (approximately 20 seconds) or
“Slow” (approximately 120 seconds) settings may be more desirable for
slow speed operation where frequent ground track changes will occur
(e.g. sailing or hiking). It is highly recommended that you select the
“Automatic” setting for most applications.
6-1
6.2PLOTTING SETUP
The Plotting Setup Page is used to
configure the Plot Page and select
the types of information that will be
displayed. The first cyclic field
defines the orientation of the plot
map. The top of the plot map may be
North (North Up), the direction of
your current ground track (TRK Up),
or the direction of the active leg of a
route (DTK Up). To select the desired option, highlight this field and
press CLR. Your present position and nearby waypoints are displayed
on the plot map at all times. The second cyclic field determines what
additional information will be displayed on the plot map. You may
display the active route and a stored ground track showing where you
have been, only the active route, only the ground track, or neither.
The ground track is stored at a frequency that you can define either by:
Time “Interval”, “Resolution”, or “Distance”. Select the desired frequency
unit by highlighting this field and pressing CLR.
To store the Ground Track at selected time Intervals...
· Highlight the storage frequency field (third line) and select
“Interval” with CLR.
· Press ENT.
· Enter the time interval between stored positions starting with
hours, then minutes, then seconds. Press ENT after entering data
in each numeric field.
To store the Ground Track by Distance...
· Highlight the storage frequency field and select “Distance” with
CLR.
· Press ENT.
· Enter the distance, and press ENT. When your position moves this
distance in any direction, a new position is added to the stored
ground track. NOTE: “Distance” storage may be preferable to
“Resolution” storage if the ground track will include a large
number of turns.
6-2
If the planned course will be primarily straight line travel, you should
select “Resolution” storage. In this application, considerably less memory
is used for the same distance traveled.
To store the Ground Track by Resolution...
· Highlight the storage frequency field and select “Resolution” with
CLR.
· Press ENT.
· Enter the resolution range, and press ENT. When your position
moves this defined range off a projected courseline, a new position
is added to the stored ground track.
The track storing function may be turned on and off by highlighting the
“Track>” field and pressing CLR. From this same field, the track may be
set to “wrap” around through available memory (deleting the oldest
track information and using the memory to store the new track position).
The amount of memory, used at any given moment, is shown on the
bottom line. When available memory is filled or the track is no longer
needed, it may be cleared by highlighting “Clear?” and pressing ENT.
6.3UNITS/HEADING SETUP
The Units/Heading Page is used to
select the units to display for
position, distance, speed and
heading information. Select the
desired
position
units
by
highlighting the “POSN” field and
pressing CLR. You may choose
between degrees only (hddd.ddddd°);
degrees
and
minutes
(hddd°mm.mmm’); degrees, minutes and seconds (hddd°mm’ss.s”); UTM/
UPS; or various regional grid coordinates.
Select the desired distance and speed units by highlighting the “NAV”
field and pressing CLR. You may choose between nautical (nautical
miles/knots/feet), statute (statute miles/miles per hour/feet), or metric
(kilometers/kilometers per hour/meters) units.
Heading information can be displayed referencing magnetic north
(automatically calculated or user-defined), referencing true north or
referencing calculated grid headings. Select the desired heading reference
by highlighting the “HDG” field and pressing CLR. When the “Auto Mag
Var[iation]” option is selected, heading information will reference the
6-3
automatically calculated magnetic variation shown.
For most
applications, the “Auto Mag” feature will provide accurate heading
information. If the auto-magnetic variation is not correct, you may
define the magnetic variation by selecting “User Mag Var”. If the “User
Mag Var” option is selected, the magnetic variation is then entered.
To enter a user-defined magnetic variation...
· Highlight the “HDG” field and select “User Mag Var” with CLR.
· Press ENT.
· The variation direction is highlighted.
press CLR.
To change the direction,
· Press ENT.
· Enter the variation degrees and press ENT.
6.4ALARMS AND CDI SETUP
From the Alarms/CDI Page, you may
define three alarms (and turn them
on or off) and configure the graphic
CDI to your preference. Alarms are
available for anchor drift, arrival at
a destination waypoint, and an alarm
clock.
To set the anchor alarm...
· Highlight the anchor alarm distance and enter the maximum
allowable drift. CAUTION: Setting the anchor alarm to its
smallest value (.01 unit) may result in a false alarm. Please note
that under certain circumstances (below average satellite geometry,
degraded reception, etc.) the position error of the GPS 75 may be
greater than the lowest scale settings available for this alarm.
· Press ENT.
· The on/off cyclic field is highlighted. If the alarm is not turned on,
press CLR.
To set the arrival alarm...
· Highlight the arrival alarm distance and enter the distance from
a destination at which you want the alarm to sound.
6-4
· Press ENT.
· The on/off cyclic field is highlighted. If the alarm is not turned on,
press CLR.
To set the alarm clock...
· Highlight the alarm clock time and enter the desired alarm time.
NOTE: The alarm time may be either UTC or local time depending
on the setting on the Date/Time Page. (See Section 6.5.)
· Press ENT.
· The on and off cyclic field is highlighted. If the alarm is not turned
on, press CLR.
The graphic CDI may be configured to the desired scale and steering
orientation. Scale settings of ±.10, .50, 1.00, 5.00, 10.0, or 50.0 units
(nautical miles, statute miles, or kilometers) are available. The scale
setting represents the distance from center of the CDI to either end. You
may change the scale setting by highlighting the “CDI Scale” field and
pressing CLR. The CDI “Steer To” orientation determines how you
interpret the “D-Bar” when it moves. You may select “Steer to >Center”
or “Steer to >D-Bar” by highlighting that field and pressing CLR. A
“Steer to Center” orientation, in effect, displays your position as the “DBar” and the center of CDI is the desired track. Thus, when you are off
course, you would steer towards the center of the scale. A “Steer to DBar” orientation is just the opposite. The “D-Bar” represents the desired
track and the center of the scale represents your position. When you are
off course, you then steer towards the “D-Bar”.
6.5DATE/TIME
The Date/Time Page displays the
UTC (Coordinated Universal Time
or Greenwich Mean Time) date and
time. The local offset or time
difference is shown on the next line.
For time zones west of the UTC
zone, enter a negative offset. (The
minus sign is on the “9” key.)
Appendix E contains a list of time
offsets.
The cyclic field for “Display” options determines which time, UTC or
Local, will be displayed on other GPS 75 pages. To change this option,
highlight this field and press CLR.
6-5
The timer field can be selected as “Count Up” or “Count Down” by
highlighting and pressing CLR. To clear the count up timer, highlight
each time field, press CLR, then ENT.
To set the count down timer, enter the hours, minutes, then seconds to
count down from. The “Timer Expired” message will be displayed when
the timer reaches zero.
6.6AUDIO AND DISPLAY SETUP
From the Audio and Display Page,
you can turn the message and/or
keypad tones on and off, change the
display contrast, and change the
timeout for the display backlighting.
Select the desired tone option by
highlighting the “Tone>” field and
pressing CLR.
To change the display contrast...
· Highlight “Change Contrast?” and press ENT.
· The contrast bar is highlighted.
to change the contrast level.
Press the left or right arrow key
· When the desired contrast level is reached, press ENT.
The Backlighting Timeout determines the length of time the display and
keypad backlighting will remain on. If no keys are pressed for the
specified time, the backlighting will automatically shut off. Set the
timeout interval by highlighting that field, entering the desired timeout
and pressing ENT.
6.7INTERFACE SETUP
From the Interface Page, you may
select the input or output format
needed to connect your GPS 75 to
other equipment: plotter, autopilot,
another GPS 75, a PC, etc. You may
select no input/output (NONE/
NONE), NMEA output, GARMIN
input/output, or RTCM input by
highlighting the cyclic field and
pressing CLR. When the NMEA
6-6
output is selected, a second cyclic field appears. From this second field,
you may select the desired NMEA format: NMEA 0180, NMEA 0182 or
NMEA 0183.
A second cyclic field also appears when the GARMIN input/output is
selected. The GARMIN option allows you to exchange data such as
waypoints, routes, track logs and satellite almanac data with another
GPS 75 or with a PC-compatible computer. You may select between
acting as a HOST to data exchanges, REQUESTing data, or SENDing
data by highlighting the cyclic field and pressing CLR. When the HOST
option is selected, all interface operations are controlled by another GPS
75 or PC-compatible computer. When the REQUEST or SEND options
are selected, the GPS 75 will control the data exchange. With the
REQUEST or SEND options, a third cyclic field appears where you may
define the type of data to be exchanged: routes, track log, waypoints,
almanac, or proximity waypoints. Select the desired type of data by
highlighting this field and pressing CLR. Press ENT to begin the data
transfer. During the data transfer process, the number of data packets
being exchanged will be displayed. Note: When exchanging data
between two GPS 75s, one should be set to HOST and the second should
be set to the desired data transfer option (REQUEST or SEND).
The GPS 75 can use Differential GPS (DGPS) corrections in RTCM SC104 version 2.0 format. DGPS corrections in this format can be received
from an external device (capable of output in 6 of 8 byte format as
specified by RTCM SC-104, version 2.0) by connecting the device to the
input port on the back of the GPS 75 and selecting an RTCM input
interface mode. Two RTCM input modes are available, one which allows
no output and another which allows NMEA output in 0180, 0182, or 0183
format.
6.8MAP DATUM SELECTION
Select the desired map datum
reference from the Map Datum Page.
You may choose from 102 pre-defined
map datums, or you may define your
own. If the map/chart you are using
specifies a reference datum, select
that datum on your GPS 75. If the
map/chart does not specify a
reference datum, you may select each datum applicable to your region
until you find the datum that provides the best positioning at a known
point. NOTE: The GPS 75 is shipped from the factory with the WGS 84
datum selected.
6-7
To change the pre-defined datum...
· Highlight the “Change?” field and press ENT.
· With the arrow keys, find the desired datum and highlight it.
· Press ENT.
The new datum is selected
The user-defined datum option allows
you to custom-tailor a datum reference
from which all position coordinates are
calculated. All entries are defined as
differences from the WGS 84 standard
datum. CAUTION: Selection and use of
the user datum function is for individuals
experienced in the use of map datums. If
the pre-defined map datums do not
correspond to the chart you are using and you are unsure of the correct
entries required to correspond to that chart, contact the chart
manufacturer. Incorrect entries for a user-defined datum may result in
substantial position errors.
6.9BEACON RECEIVER SETUP
The Beacon Receiver Setup Page allows
you to control a GARMIN Beacon
Receiver for Differential GPS (DGPS)
position corrections. Before the beacon
receiver can be controlled by the GPS 75,
it must be connected to the I/O port on
the back of the unit and the “RTCM/
NMEA 0183” mode must be selected on
the Interface Setup Page. If this interface
mode is not selected, the GPS 75 will only display the message “No
RTCM/NMEA 0183 interface selected” on the Beacon Receiver Setup
Page. Once the correct interface is chosen, the Beacon Receiver Setup
Page will display as shown above.
The “Tuned To:” field is the frequency in kHz to which the beacon
receiver is currently tuned or is attempting to tune. Below this field is
a bit rate cyclic field which allows you to choose between bit rates of 25,
50, 100, and 200 bps by pressing the “CLR” key which the “Bit Rate” field
is highlighted. When you first select the Beacon Receiver Setup Page
from the Auxiliary Menu, (after selecting an RTCM/NMEA 0183 input/
output interface mode), the GPS 75 will automatically try to tune the last
6-8
frequency and bit rate which you selected (or the default frequency of
304.0 kHz and bit rate of 100 bps if no previous beacon has been tuned).
You may enter you own frequency (between 283.5 kHz and 325.0 kHz in
0.5 kHz increments) and bit rate if you desire. A message of “Tuning” will
then be displayed near the bottom of the page, directly after the “SNR”
field. If the “Tuned To:” frequency cannot be received within the timeout
period, the unit will stop trying to tune, the “Tuned To:” field will display
all blanks, and a status message of “No Status” will display after the
“SNR” (signal-to-noise) field. You must provide the unit with another
frequency and bit rate before it will attempt to tune again. The last field
on the Beacon Receiver Setup Page is the “View Beacon Log?” confirmation
field. Pressing “ENT” on this field will display the Beacon Log Page.
The Beacon Log Page displays the last five frequencies tuned by the user,
or the default frequency if no user
frequencies have been tuned. The most
recently tuned frequency is at the top of
the list. If the tuned frequency station
identifier and position were available
when the frequency was last tuned, the
list will also display the “Stn ID” number
and the distance to the transmitting
beacon. You can tune any frequency in
this list by pressing the left or right arrow key until the desired frequency
is highlighted and then press “ENT”. The display will immediately
return to the Beacon Receiver Setup Page with the selected frequency
from the Beacon Log Page as the “Tuned To:” frequency, and the bit rate
as the last bit rate used with the selected frequency. If you view the
Beacon Log Page and decide that you do not want to tune any of the
frequencies in the log, simply press “CLR” on any field to return to the
Beacon Receiver Setup Page.
6.10 SUNRISE/SUNSET PLANNING
The Sunrise/Sunset Page allows you
to calculate the sunrise and sunset
times for a given waypoint location
on a selected date (from 1990 through
2089).
6-9
To calculate the sunrise/sunset times for a waypoint...
· Highlight the waypoint name field and enter the desired waypoint
name.
· Press ENT
. The date field is highlighted. Enter the day, then month, then year
to calculate the sunrise/sunset times. Press ENT on each
alphanumeric field.
· Once the year is selected and ENT is pressed, the calculated
sunrise and sunset times will be shown. Please note that the times
shown will be either UTC or local depending on the selection made
on the Date/Time Page. (See Section 6.5.)
6.11 TRIP AND FUEL PLANNING
The Trip and Fuel Planning Page
allows you to calculate time and fuel
requirements between any two
waypoints or for any programmed
route. On the first cyclic field, you
will choose between waypoint (WPT)
or route (RTE) planning by
highlighting and pressing CLR. If
route planning is selected, you would then select the desired route
number and the portion of the route (a given leg or all of the route) to
calculate for.
The final step is to enter speed and fuel flow rates. The GPS 75 will then
calculate the desired track (DTK), fuel requirements (REQ), range
(RNG), and estimated time enroute (ETE).
To perform a Trip and Fuel Plan, waypoint to waypoint...
· Highlight the first cyclic field (top
left), and press CLR to select
“WPTS:”.
· Highlight the waypoint name field
(second line), and enter the first
waypoint name followed by ENT.
· The second waypoint name field is now highlighted.
second waypoint name followed by ENT.
6-10
Enter the
· The speed (SPD) field is highlighted.
and press ENT.
Enter the intended speed,
· The fuel flow (Flow) field is highlighted.
flow followed by ENT.
Enter the estimated fuel
· The GPS 75 will now display the calculated figures.
To perform a Trip and Fuel Plan for a route...
· Highlight the first cyclic field (top
left), and select “RTE” with CLR.
· Highlight the next cyclic field and
select the desired route number
by pressing CLR.
· Highlight the “Leg>” field and select the desired leg, or select “All”
for the entire route, using CLR.
· Highlight the “SPD:” field and enter the intended speed, followed
by ENT.
· Highlight the “Flow:” field and enter the estimated fuel flow
followed by ENT.
· The GPS 75 will now display the calculated figures.
6.12 MESSAGES
You may recall from Section 2.6 that
some messages will remain on the
Message Page after being viewed.
When this occurs, the “MSG”
annunciator remains on (but does
not flash) in the lower left corner. To
view
these
messages,
select
“Messages” from the Auxiliary Page.
See Appendix A for a description of
available messages.
6-11
APPENDIX A
MESSAGES
The GPS 75 uses the Message Page to communicate important information
to you. Some messages are advisory in nature, others are warnings that
may require your intervention. This appendix provides a complete list
of messages and their meanings. Please pay careful attention to all
messages.
Alarm Clock - The alarm time for the alarm clock has been reached.
Anchor Drag Alarm - Your craft has drifted outside the anchor drag
radius set on the Alarm Page.
Approaching ____ - You are less than one minute from reaching the
indicated waypoint.
Arrival At ____ - Your craft has entered the arrival alarm circle for the
indicated destination waypoint.
Battery Low - The battery pack is low on power. AA batteries should
be replaced or the rechargeable battery pack should be recharged for
continued operation.
Can't Chng Activ WPT - An attempt has been made to modify the
position of the “active to” or “active from” waypoint. The GPS 75 will not
allow the modifications.
Degraded Accuracy - The accuracy of the GPS 75 position is degraded
beyond 500 meters due to satellite geometry or data quality. Additional
cross checking should be performed by the user to verify the integrity of
the GPS position.
Memory Battery Low - The battery that sustains user memory is low
and should be replaced by an authorized GARMIN service center as soon
as possible. Failure to do so may result in loss of stored data, including
all waypoints and routes.
No DGPS Position
corrected position.
- Not enough DGPS data is available to compute a
No RTCM Input - A beacon receiver is improperly connected to the
input port on the back of the GPS 75, a connected beacon receiver is not
transmitting in an RTCM SC-104 version 2.0 format, or the baud rates
do not match between the GPS 75 and the beacon receiver.
A-1
Osc Needs Adjustment - The GPS 75 has detected excessive drift in its
internal crystal oscillator which may result in longer acquisition time.
The unit should be taken to an authorized GARMIN service center as
soon as possible.
Poor GPS Coverage - The GPS 75 cannot acquire sufficient satellites
necessary to provide navigation.
Pwr Down and Re-init - The GPS 75 is unable to compute a position
due to abnormal satellite conditions. Power down the unit and verify
that the position on the Position Page is within a few degrees of your
actual position.
Proximity Alarm - Your craft has penetrated the alarm circle of a
proximity waypoint.
Proximity List Full - An attempt to upload more than nine proximity
waypoints has been made.
Proximity Overlap ____ - The circles defined by two proximity waypoints
overlay. When entering the area of the overlap, the GPS 75 will alert you
of the closest proximity waypoint, but not both. You should be certain
this condition is desirable.
Proximity Waypoint - An attempt has been made to delete a waypoint
for which a proximity alarm has been defined. You must remove the
waypoint from the proximity list before the waypoint can be deleted.
Received Invalid Wpt - A waypoint was received in an upload/transfer
operation that has an invalid identifier or position.
Receiver Failed - The GPS 75 has detected a failure in the receiver
hardware. If the message persists, the GPS 75 is unusable and should
be taken to an authorized GARMIN service center.
ROM Failed - The GPS 75 has detected a failure in its permanent
memory. If this message occurs, the unit is unusable and should be taken
to an authorized GARMIN service center.
Route is Full - An attempt has been made to add more than 20
waypoints to a route. The GPS 75 will not allow more than 20 waypoints
per route.
Route Not Empty - An attempt has been made to copy a route to a nonempty route. The GPS 75 will not allow you to copy a route to a nonempty route.
A-2
Route Waypoint - An attempt has been made to delete a waypoint
which is a member of one or more routes. You must remove the waypoint
from all routes before the waypoint can be deleted.
Route Wpt Deleted - A waypoint in a transmitted route does not exist
in the database and has been deleted from the route.
RTCM Input Failed - RTCM data was being received but the connection
has been lost.
Searching the Sky - The GPS 75 is in the search-the-sky mode. Allow
the unit to complete its data collection before turning it off. This process
takes approximately 15 minutes.
Stored Data Lost - Stored user data, including waypoints, routes, and
satellite orbital data has been lost due to a low memory battery.
Timer Expired - The count down timer has expired.
Track Memory Full - The track memory is full. Go to the Plotting Setup
Page and clear the memory.
WPT Exists ____ - You have entered a waypoint name on the AutoStoreTM
Page that already exists in memory. Enter a waypoint name that does
not exist.
WPT Memory Full - The waypoint memory is full. You should delete
unused waypoints to make room for new waypoints.
WPT/RTE RX Started - The GPS 75 has received the first data
transmission in a waypoint/route upload or transfer operation.
WPT/RTE TX Complete - The GPS 75 has transmitted the last
information in a waypoint/route transfer operation.
A-3
APPENDIX B
GLOSSARY AND NAVIGATION TERMS
B.1
DEFINITIONS
This section provides an illustration of and definitions for the terms used
in this manual.
B-1
Velocity/time terms:
GS
Ground speed. GS is the speed measured relative to a ground
position; also known as velocity over ground (VOG).
VMG
Velocity made good. VMG is velocity in the direction of the
desired course. It is the speed at which you are closing on the
“active to” waypoint.
ETA
Estimated time of arrival. ETA is the estimated time you will
reach the “active to” waypoint based on VMG. This time is
selectable as either UTC or local.
ETE
Estimated time enroute. ETE is the time it will take to reach the
“active to” waypoint based on VMG.
Direction terms:
DTK
Desired track.
waypoints.
DTK is the course between the “from” and “to”
BRG
Bearing. BRG is the direction from your position to the “active
to” waypoint.
CTS
Course to steer. CTS is the recommended direction to steer in
order to reduce cross track error and stay on course (see Section
B.2 for an example using CTS).
CMG
Course made good. CMG is the bearing from the “active from”
waypoint to your position.
TRK
Track. TRK is the direction of movement relative to a ground
position.
TRN
Turn instruction. TRN is the difference between BRG and TRK.
“L” indicates you should turn to the left, “R” indicate you should
turn to the right. The degrees indicate the angle you are off
course.
Distance terms:
RNG
Range. RNG is the great circle distance from your position to the
“active to” waypoint.
DMG Distance made good. DMG is the distance from the “active from”
waypoint to your position.
XTK
B-2
Crosstrack. XTK is the cross track error, or distance that you are
off course. If the crosstrack error exceeds the CDI scale setting,
the XTK distance will also be displayed on the appropriate side
of the CDI.
ATD
Along track distance. ATD is the along track distance to the
“active to” waypoint. It is measured from the point on the course
closest to your position.
Satellite terms:
DOP
Dilution of precision. DOP is a measure of the satellite geometry
quality and hence the relative accuracy of your position (one
meaning the best and ten meaning poor).
EPE
Estimated Position Error. EPE, which is computed using the
satellite geometry (DOP), signal and data quality, receiver
tracking status and other factors, is an overall measure of your
position accuracy.
B.2 COURSE TO STEER (CTS)
Course To Steer is a GARMIN exclusive that recommends an optimal
direction to steer that will guide you to the course and proceed efficiently
along your route.
B-3
As an example, suppose you activate the route illustrated above. The
GPS 75 chooses the closest leg with a desired track of 45 degrees but your
position happens to be two nautical miles off course. The unit will
automatically compute the optimal course to steer (which is due north in
this example). Press the NAV key until the Nav Summary Page is
displayed, then select “CTS” on line two. Using the CTS direction (000°),
turn so that the track (TRK) and CTS direction match.
As you approach the course, CTS will slowly change and, once on course,
will be identical to the desired track.
B-4
APPENDIX C
INSTALLATION AND MAINTENANCE
C.1
SPECIFICATIONS
GPS 75 SPECIFICATIONS *
—————————————————————————————-
PHYSICAL
Case:
Waterproof
Size:
Portable: 3.23"w x 6.26"h x 1.46"d
(82mm x 159mm x 37mm)
Fixed:
Weight:
3.23"w x 4.87"h x 1.46"d
(82mm x 124mm x 37mm)
14 ounces (0.4 kg) without battery pack
19 ounces (0.54 kg) with battery pack
POWER
Input
Alkaline battery pack (4 AA size)
Rechargeable battery pack
12- or 24-volt DC with power cable (5-40 VDC)
115- or 230-volt AC with battery charger
Consumption
1.3 watts in Normal mode (without
backlighting)
ENVIRONMENTAL
Temperature:
-15°C to +70°C (+5°F to +158°F ) operating
-40°C to +70°C (-40°F to +158°F) storage
Humidity:
95% non-condensing
PERFORMANCE
Receiver:
MultiTracTM, tracking up to 8 satellites
Acquisition Time: 2 minutes 2D
(typical)
2.5 minutes 3D
15 seconds Warm Start (with ephemeris)
Accuracy:
Position:
15 meters (49 ft) RMS**
C-1
Velocity:
Dynamics:
0.1 knots RMS steady state
90 knots velocity, 3g dynamics
INTERFACES
NMEA 0180
NMEA 0182
NMEA 0183 (Version 1.5; December 1987)
Approved sentences:
GPBWC, GPGLL, GPRMB, GPRMC, GPR00, GPWPL, GPXTE
Proprietary sentences:
PGRMZ
- Altitude sentence
PGRMM
- Datum sentence
Transmission rate:
GPBWC, GPVTG, GPGLL, GPRMB, GPRMC, GPXTE, and
PGRMZ transmitted once every two seconds.
GPR00 transmitted once every (# of all waypoints + 1) * 2
seconds. e.g., if there are two route waypoints, this sentence
will be transmitted once every six seconds.
GPWPL transmits all route waypoints in (# of route waypoints
+ 1) * 2 seconds. e.g., if there are two route waypoints, this
sentence will be transmitted twice every six seconds.
RTCM SC-104 (version 2.0; January 1990):
Decoded messages:
Type 1, Type 2, Type 3, and Type 9
6-of-8 byte format required
Communication Parameters:
300, 600, 1200, 2400, 4800, 9600 Baud 1 Start/1 Stop Bit, 8 data
Bits, No Parity (Except that RTCM/NMEA 0180 and RTCM/
NMEA 0182 interface selections require 1200 Baud with odd
parity and RTCM/NMEA 0183 requires 4800 Baud.)
C-2
—————————————————————————————NOTES:
* All specifications are subject to change without notice.
** Subject to accuracy degradation to 100m 2DRMS under the
United States Department of Defense imposed Selective
Availability program. (Due to satellite geometry, altitude error is
typically two to three times the horizontal position error.)
C.2
ELECTRICAL WIRING
The GPS 75 power/data cable allows you to connect the unit to vehicle
power systems, other marine electronics, a remote alarm/beeper, or an
external DGPS device that outputs RTCM SC-104, version 2.0 data. The
harness will plug into the connector located on the rear panel of the GPS
75.
To connect to vehicle power systems...
· Connect the RED harness lead (with fuse) to the positive (+) side
of a 5-40 volt DC power source.
· Connect the BLACK harness lead to the negative (-) side of the 540 volt DC power source.
C-3
The GPS 75 will drive a remote alarm or relay that requires no more than
100 milliamps of current. (WARNING: Devices which draw current in
excess of 100 milliamperes may damage your unit and will void your
warranty. Consult the instructions included with the remote alarm or
relay for current drain information.)
To connect to a remote alarm system...
· Connect the BLUE harness lead to the negative side of a transistor
alarm or relay switch.
· Connect the positive side of the alarm or relay to the positive side
of the 5-40 volt DC power source.
The GPS 75 may be connected to other marine electronics such as an
autopilot or plotter which use an NMEA 0180, NMEA 0182 or NMEA 0183
data interface. The unit can provide data for up to three NMEA
“listeners” simultaneously. Refer to installation instructions of these
devices for further information.
To connect the GPS 75 to an NMEA electronic device...
· Connect the BROWN harness lead to the NMEA “A” line of a twowire, shielded cable.
· Connect the BLACK harness lead to the NMEA “B” line of the
shielded cable.
· Connect the BLACK harness lead to the shield of the shielded
cable. (The opposite end of the shield should not be grounded.)
To connect the GPS 75 to an electronic device supplying RTCM
SC-104 data...
· Connect the WHITE harness lead to the output pin of the RTCM
device.
· Connect the BLACK harness lead to the ground pin of the RTCM
device.
· If the GARMIN Beacon Receiver is used, the Beacon Receiver
Page, (see Section 6.9), will tune the beacon frequency. Connect
the BROWN harness lead to the input pin (RS-232 RXD) of the
GARMIN Beacon Receiver.
Refer to GARMIN Beacon Receiver Operating Manual for connection
instructions.
C-4
C.3
UNIVERSAL MOUNT INSTALLATION
The GPS 75 is equipped with a universal mount for fixed installations.
The universal mount may be installed above the dash or attached to a
surface as shown below.
Although your GPS 75 is designed to withstand the marine environment,
it is recommended that it be mounted in a location which provides
protection from sun and spray. Before permanent mounting, you may
wish to apply power to the unit and look at the display in the desired
mounting location to ensure you have the desired viewing angle.
C-5
To install universal mount above dash...
The universal mount is completely assembled and ready for fixed
installation above dash. Mount the base to the boat dash using
appropriate screws (#8 flat head screws are recommended).
To install universal mount on a surface...
·
C-6
Remove the E-ring from the special screw under the base using a pair
of pliers.
· Remove the lever. A spring and detent pin are contained within a
recess on this lever.
· Unscrew the special screw and remove it from the base.
· The base, lever, detent pin, detent spring, plastic spacer, and wave
washer may be set aside (these parts are not used for surface
installation).
· Loosen the coinslot screw and slide the cradle to mid position
revealing 3 countersunk holes as shown in the figure at the bottom
of page C-5.
· Mount the surface mount to the dash using appropriate screws (#8
100o flat head screws are recommended).
To adjust the universal mount...
C-7
The universal mount is designed to allow the GPS 75 to be installed
either with or without the battery pack attached. To adjust the universal
mount to accept the GPS 75 with the battery pack attached:
· Loosen the coinslot screw.
· Raise the connector plate to its tallest position.
· Tighten the coinslot screw. When adjusted properly, the coinslot
screw should fit completely into the counterbore in the cradle so
that all surfaces are flush.
C.4
UNIVERSAL MOUNT OPERATION
The universal mount has been designed for easy insertion and removal
of your GPS 75 if you wish to use the unit in another boat or vehicle, plan
at home, or prevent theft.
To insert the GPS 75 into the universal mount...
· Tilt the top of the GPS 75 into the universal mount as shown.
· Engage the slot in the top of the GPS 75
the universal mount.
into the raised bump in
· Rotate the bottom of the GPS 75 into the universal mount until the
unit latches securely into place.
C-8
· Connect the antenna or antenna cable. No other electrical
connections are required; all power and data connections are made
through the 6-pin connector installed in the universal mount.
To remove the GPS 75 from the universal mount...
· Disconnect the antenna or antenna cable.
· Apply enough force to the release tab to allow the unit to pass as
shown above.
· Pull the bottom of the GPS 75 out, then rotate the top downward
and out.
To adjust the universal mount angle...
· Loosen the mount by turning the lever counter-clockwise.
· Rotate and/or tilt the unit to the desired position.
· Tighten the lever.
C-9
C.5
BATTERY PACK OPERATION
The GPS 75 is supplied with a sealed, 4-cell alkaline battery pack. The
battery pack must be removed from the unit in order to replace the cells.
To remove the battery pack...
· Push down on the spring tab on the right side of the battery pack.
· Pull the battery pack off the right side of the unit.
C-10
To replace the alkaline batteries...
· Grip the battery pack around the outside edge (not the bottom).
· Push the top of the battery pack against the edge of a hard surface
which will not mar the plastic. The outer sleeve will slide off the
cage, revealing the batteries inside.
· Replace the batteries, observing the polarity diagram engraved in
the plastic.
· Slide the sleeve over the cage until it snaps into place, taking care
that you do not tear the gaskets which seal the battery pack.
C.6
MAINTENANCE
The GPS 75 is constructed of high quality material and should not
require user maintenance. Please refer any repairs to an authorized
GARMIN service center. (The unit contains no user serviceable parts,
do not attempt repairs yourself.)
Never allow gasoline or solvents to come into contact with your unit.
Damage to the case may occur which is not covered by your warranty.
The waypoints, routes, custom settings, and other data stored in the GPS
75 are maintained by an internal battery. (This data will not be lost even
if you remove the AA or rechargeable battery pack for separate storage.)
C-11
The internal memory battery should typically last three to five years. If
the GPS 75 detects a low memory battery, you will be informed with the
message “Memory Battery Low”. You should return your unit to an
authorized GARMIN service center as soon as possible for service.
Failure to do so may result in loss of data each time you turn your unit
off (indicated by the message “Stored Data Lost”).
Your GPS 75 contains a highly accurate crystal oscillator which should
provide many years of reliable operation. If the unit detects excessive
oscillator drift, you will be informed with the message “Osc Needs
Adjustment”. You should return your unit to an authorized GARMIN
service center as soon as possible. Failure to do so may result in degraded
acquisition performance.
C.7
PRODUCT SUPPORT
Should you require additional assistance, please call our Product Support
Department. Customers in the continental United States may use our
toll free number: 1-800-800-1020. Customers outside the continental
United States may call 1-913-599-1515.
C-12
APPENDIX D
MAP DATUMS
The following is a list of the GPS 75 map datum selections and the
corresponding map datum name (including the area of application):
Adindan
Afgooye
AIN EL ABD 1970
Anna 1 Astro 1965
ARC 1950
ARC 1960
Ascension Island ‘58
Astro B4 Sorol Atoll
Astro Beacon “E”
Astro Dos 71/4
Astronomic Stn ‘52
Australian Geod ‘66
Australian Geod ‘84
Bellevue (IGN)
Bermuda 1957
Bogota Obsrvatry
Campo Inchauspe
Canto Astro 1966
Cape
Cape Canaveral
Carthage
Chatham 1971
Chua Astro
Corrego Alegre
Djakarta (Batavia)
Dos 1968
Easter Island 1967
European 1950
European 1979
Finland Hayford
Gandajika Base
Adindan - Ethiopia, Mali, Senegal, Sudan
Afgooye - Somalia
AIN EL ABD 1970 - Bahrain Island, Saudi Arabia
Anna 1 Astro 1965 - Cocos Islands
ARC 1950 - Botswana, Lesotho, Malawi, Swaziland, Zaire,
Zambia, Zimbabwe
ARC 1960 - Kenya, Tanzania
Ascension Island ‘58 - Ascension Island
Astro B4 Sorol Atoll - Tern Island
Astro Beacon “E” - Iwo Jima Island
Astro Dos 71/4 - St. Helena Island
Astronomic Stn ‘52 - Marcus Island
Australian Geod ‘66 - Australia, Tasmania Island
Australian Geod ‘84 - Australia, Tasmania Island
Bellevue (IGN) - Efate and Erromango Islands
Bermuda 1957 - Bermuda Islands
Bogota Obsrvatry - Colombia
Campo Inchauspe - Argentina
Canto Astro 1966 - Phoenix Islands
Cape - South Africa
Cape Canaveral - Florida, Bahama Islands
Carthage - Tunisia
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 - Easter Island
European 1950 - Austria, Belgium, Denmark, Finland,
France, Germany, Gibraltar, Greece, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland
European 1979 - Austria, Finland, Netherlands, Norway,
Spain, Sweden, Switzerland
Finland Hayford - Finland
Gandajika Base - Republic of Maldives
D-1
Geodetic Datum ‘49
Guam 1963
Gux 1 Astro
Hjorsey 1955
Hong Kong 1963
Indian Bangladesh
Indian Thailand
Ireland 1965
ISTS 073 ASTRO ‘69
Johnston Island
Kandawala
Kergulen Island
Kertau 1948
L.C. 5 Astro
Liberia 1964
Luzon Mindanao
Luzon Philippines
Mahe 1971
Marco Astro
M a s s a wa
Merchich
Midway Astro 1961
Minna
NAD27 Alaska
NAD27 Bahamas
NAD27
NAD27
NAD27
NAD27
NAD27
NAD27
NAD27
NAD27
NAD27
NAD83
D-2
Geodetic Datum ‘49 - New Zealand
Guam 1963 - Guam Island
Gux 1 Astro - Guadalcanal Island
Hjorsey 1955 - Iceland
Hong Kong 1963 - Hong Kong
Indian - Bangladesh, India, Nepal
Indian - Thailand, Vietnam
Ireland 1965 - Ireland
ISTS O73 ASTRO ‘69 - Diego Garcia
Johnston Island - Johnston Island
Kandawala - Sri Lanka
Kergulen Island - Kerguelen Island
Kertau 1948 - West Malaysia, Singapore
L.C. 5 Astro - Cayman Brac Island
Liberia 1964 - Liberia
Luzon - Mindanao Island
Luzon - Phillippines (excluding Mindanao Island)
Mahe 1971 - Mahe Island
Marco Astro - Salvage Islands
Massawa - Eritrea (Ethiopia)
Merchich - Morocco
Midway Astro 1961 - Midway Island
Minna - Nigeria
NORTH AMERICAN 1927 - Alaska
NORTH AMERICAN 1927 - Bahamas (excluding San
Salvador Island)
Canada
NORTH AMERICAN 1927 - Canada (including
Newfoundland Island)
Canal Zone
NORTH AMERICAN 1927 - Canal Zone
Caribbean
NORTH AMERICAN 1927 - Caribbean (Barbados, Caicos
Islands, Cuba, Dominican Republic, Grand Cayman,
Jamaica, Leeward Islands, Turks Islands)
Central
NORTH AMERICAN 1927 - Central America (Belize,
Costa Rica, El Salvador, Guatemala, Honduras,
Nicaragua)
CONUS
NORTH AMERICAN 1927 - Mean Value (CONUS)
Cuba
NORTH AMERICAN 1927 - Cuba
Greenland
NORTH AMERICAN 1927 - Greenland (Hayes Peninsula)
Mexico
NORTH AMERICAN 1927 - Mexico
San Salvadr
NORTH AMERICAN 1927 - San Salvador Island
NORTH AMERICAN 1983 - Alaska, Canada, Central
America, CONUS, Mexico
Nahrwn Masirah Ilnd
Nahrwn Saudi Arbia
Nahrwn United Arab
Naparima BWI
Observatorio 1966
Old Egyptian
Old Hawaiian
Oman
Ord Srvy Grt Britn
Pico De Las Nieves
Pitcairn Astro 1967
Prov So Amricn ‘56
Prov So Chilean ‘63
Puerto Rico
Qatar National
Qornoq
Reunion
Rome 1940
RT 90
Santo (Dos)
Sao Braz
Sapper Hill 1943
Schwarzeck
South American ‘69
South Asia
Southeast Base
Southwest Base
Timbalai 1948
Tokyo
Tristan Astro 1968
Viti Levu 1916
Wake-Eniwetok ‘60
WGS 72
WGS 84
Zanderij
Nahrwn - Masirah Island (Oman)
Nahrwn - Saudi Arabia
Nahrwn - United Arab Emirates
Naparima BWI - Trinidad and Tobago
Observatorio 1966 - Corvo and Flores Islands (Azores)
Old Egyptian - Egypt
Old Hawaiian - Mean Value
Oman - Oman
Ord Srvy Grt Britn - England, Isle of Man, Scotland,
Shetland Islands, Wales
Pico De Las Nieves - Canary Islands
Pitcairn Astro 1967 - Pitcairn Island
Prov So Amricn ‘56 - Bolivia, Chile,
Colombia, Ecuador, Guyana, Peru, Venezuela
Prov So Chilean ‘63
- South Chile
Puerto Rico - 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 1943 - East Falkland Island
Schwarzeck - Namibia
South American ‘69 - Argentina, Bolivia, Brazil, Chile,
Colombia, Ecuador, Guyana, Paraguay, Peru, Venezuela,
Trinidad and Tobago
South Asia - Singapore
Southeast Base - Porto Santo and Madeira Islands
Southwest Base - Faial, Graciosa, Pico, Sao Jorge, and
Terceira Islands (Azores)
Timbalai 1948 - Brunei and East Malaysia (Sarawak and
Sabah)
Tokyo - Japan, Korea, Okinawa
Tristan Astro 1968 - Tristan da Cunha
Viti Levu 1916 - Viti Levu Island (Fiji Islands)
Wake-Eniwetok ‘60 - Marshall Islands
WORLD GEODETIC SYSTEM 1972
WORLD GEODETIC SYSTEM 1984
Zanderij - Surinam
D-3
APPENDIX E
UTC TIME TO LOCAL TIME OFFSET
Reference the chart below to find the UTC-to-local time offset for your
longitude zone. (If you are in a daylight savings time zone, add one hour
to the offset.) For example, if you are at longitude W081°00.00' and UTC
time is 16:00, local time is 11:00 standard time.
Longitude Zone
W180.0°
W172.5°
W157.5°
W142.5°
W127.5°
W112.5°
W097.5°
W082.5°
W067.5°
W052.5°
W037.5°
W022.5°
W007.5°
E007.5°
E022.5°
E037.5°
E052.5°
E067.5°
E082.5°
E097.5°
E112.5°
E127.5°
E142.5°
E157.5°
E172.5°
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
to
W172.5°
W157.5°
W142.5°
W127.5°
W112.5°
W097.5°
W082.5°
W067.5°
W052.5
W037.5°
W022.5°
W007.5°
E007.5°
E022.5°
E037.5°
E052.5°
E067.5°
E082.5°
E097.5°
E112.5°
E127.5°
E142.5°
E157.5°
E172.5°
E180.0°
Offset
- 12
- 11
- 10
- 9
- 8
- 7
- 6
- 5
- 4
- 3
- 2
- 1
0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
NOTE: The time zone boundaries given above may be different depending
on your area. Consult your charts for more accurate information
concerning time zones.
E-1
APPENDIX F
INDEX
A
Active from waypoint
Active route
Active Route Page
Active to waypoint
Alarm Clock
Alarm/CDI Page
Alarms
alarm clock
anchor drag
arrival
proximity
Along Track Distance (ATD)
Alphanumeric field
Altitude
GPS
manual entry
units
Anchor drag alarm
Arrival alarm
Audio/Display Setup Page
AutoLocate TM
Automatic magnetic variation
AutoStore TM
Auxiliary Page
4-1
4-1
4-5
4-1
6-5
6-4
6-5
6-4
6-4
5-1
B-3
2-2
3-1
3-4
6-3
6-4
6-4
6-6
3-4
6-3
3-6
6-1
B
Backlighting
adjusting
2-3
timeout
6-6
Bar Graph, Satellite Status 3-2
Battery Pack
AA size
1-2
Rechargeable
1-2
Removing
C-10
Battery Saver mode
2-5
Beacon Log Page
6-8
Beacon Receiver Page
Bearing (BRG)
6-8
B-2
C
CDI Page
CDI Scale
Clock, alarm
Confirmation field
Contrast, changing
Coordinate entry
Count down timer
Count up timer
Course made good (CMG)
Course to steer (CTS)
Crosstrack (XTK)
Cursor
Cyclic field
3-9
6-5
6-5
2-2
6-6
3-4
6-5
6-5
B-2
B-2
B-2
2-2
2-2
D
Data entry
2-4
Date/Time Page
6-5
Desired Track (DTK)
B-2
Differential GPS (DGPS)
6-7
Dilution of Precision (DOP) B-3
Display
2-1
Distance Made Good (DMG) B-2
Distance, track storing
6-2
E
Estimated Position Error
(EPE)
Estimated Time Enroute
(ETE)
Estimated Time of Arrival
(ETA)
B-3
B-2
B-2
F-1
F
Field
alphanumeric
bar
confirmation
cyclic
numeric
Filters
position
velocity
Fuel Planning
2-2
2-2
2-2
2-2
2-2
Manual altitude entry
Map datum
Map Datum Page
Message annunciator
Message Page
Messages, description
Metric Units
I
N
6-1
6-1 Nautical units
6-8 Navigation
2D
3D
Navigation
pages
3-7
Navigation
Summary Page
B-2
Navigation units
Nearest Waypoint Page
NMEA output
6-3 Normal mode
Numeric field
Installation
Interface format
Interface Page
Interval, track storing
C-5
6-6
6-6
6-2
G
GOTO waypoint
Ground Speed (GS)
H
Heading Selection (HDG)
K
Keypad
using
tone
L
Local date/time
M
Magnetic variation
automatic
true north
user-defined
Maintenance
Man overboard (MOB)
F-2
6-3
6-3
6-3
C-11
3-11
6-3
3-1
3-1
3-8
3-9
6-3
5-1
6-6
2-5
2-2
O
Offset, local time
Operating mode
Operating Mode Page
Orientation
Plot
CDI
2-2 O u t p u t
NMEA
6-6
WPT/RTE Transfer
6-5
3-4
D-1
6-7
2-4
6-11
A-1
6-3
6-5
2-5
6-1
6-2
6-4
6-6
6-6
P
Page
Plot Page
Plot Page Scale
Plot Page Setup
Position entry
Power off operation
Power on operation
Present Position Page
Product Support
2-1
3-10
3-10
6-2
3-4
2-2
3-1
3-3
C-12
Proximity alarm
Proximity Waypoint Page
R
Range (RNG)
Relative Bearing Pointer
Resolution, track storing
Route Definition Page
Route List Page
Routes
activating
building with AutoStore TM
clearing
copying
creating
deleting
editing active routes
editing storage routes
navigating
S
Satellite Status
bar graph
table
Satellite Status Page
Scale, Plot Page
Searching the sky
Self test
Setup operations
Simulator mode
Skyview Display
Statute units
Steer to, CDI
Sunrise/Sunset Planning
5-1
count up
5-1 Track (TRK)
Track storing
Trip planning
B-2 True heading
3-9 Turn (TRN)
6-3
U
4-2
4-5 Units/Heading Page
Units, selecting
4-3 Universal mount
4-6 User-defined magnetic
4-6
variation
4-3 UTC time
4-2 UTM coordinates
4-6
4-5 V
4-4 Velocity Made Good (VMG)
4-1
W
3-2
3-2
3-2
3-10
3-1
3-1
6-1
2-5
3-3
6-3
6-4
6-9
Waypoint Definition Page
Waypoint List
Waypoints
creating
deleting
modifying
nearest
proximity
renaming
scanning
Wiring
WPT/RTE Transfer
6-5
B-2
6-2
6-8
6-3
B-2
6-3
6-3
C-5
6-4
6-5
6-3
B-2
3-5
3-6
3-5
3-6
3-5
5-1
5-1
3-6
5-3
C-3
6-6
T
Time
local
UTC
Timers
count down
6-5
6-5
6-5
F-3
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