Garmin GPS 3 Manual

							Once a TracBack has been activated, the GPS III will take one of the track logs cur-
rently stored in memory and divide it into route segments, called ‘legs’. Up to 30 track
log waypoints (labeled ‘T###’, e.g. ‘T001’) will be created to mark the most significant
features of the track log in order to duplicate your path as closely as possible. To gain
the most benefit from the TracBack feature, keep the following tips in mind:
• Always clear the track log at the point you want to return to (boat ramp, dock,
trailhead, etc.)
• The ‘Record Mode’ on the Track Logs Page must be set to ‘Wrap’ or ‘Fill’.
• There must be at least two track log points stored in memory to create a
TracBack route.
• If there is not enough available memory to add more waypoints and create a
TracBack route, you will be alerted with a ‘waypoint memory full’ message. The
receiver will use the available waypoints to create a route with an emphasis on
the track log data closest to the destination. Also, existing track log waypoints
that are not contained in routes will be erased to free more memory. The GPS III
will create new waypoints using the first available three-digit number.
• If the Track Logs Page ‘Interval’ field is set to ‘Time’, the route may not follow
your exact path. (Keep the ‘Interval’ field set to ‘Resolution’ for best results.)
• If the receiver is turned off or satellite coverage is lost during your trip, TracBack
will draw a straight line between any point where coverage was lost and where
it resumed.
• If there are frequent changes in direction and distance in your track log, 30 way-
points may not accurately depict your exact path. The receiver will then assign
the 30 waypoints to the most significant points of your track log, and simplify
segments with fewer changes in direction.
A TracBack route contains a
series of waypoints labeled
‘T###’ that approximate your
previous route of travel.
‘Wrap’ will overwrite the old
track log data in memory,
once all memory has been
used. ‘Fill’ will record data
until memory is full, then
stop.
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TracBack Tips
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							Route navigation allows you to manually create a sequence of intermediate way-
points which lead you to your final destination. The GPS III will store up to 20
reversible routes, with up to 30 waypoints in each route. Routes can be created and
modified by text entry (using the rocker keypad to enter waypoint names) or directly
from the map display. Using the map display allows you to see each route graphically
on-screen as you create, review, modify or navigate the route. All of the GPS III’s route
functions are accessed through the Main Menu.
To create a new route by entering the name of each waypoint:
1. Press MENU twice to display the Main Menu.
2. Highlight ‘Routes’ and press ENTER. The Route List is displayed, showing all routes
stored in memory.
3. Press MENU to display the Route Options.
4. Highlight ‘New Route’ and press ENTER. The GPS III creates a route called ‘EMPTY- 1’. 
(The name changes as you add waypoints to the route, so make note of the route 
name for future reference.)
5. Highlight the first waypoint name field and press ENTER to begin entering the name of
an existing waypoint in memory.
6. Use the rocker keypad to enter the name of the route waypoint.
7. Press ENTER to accept the selected route waypoint.
8. Highlight the next waypoint name field, press ENTER and repeat steps 6 & 7 until all 
the waypoints have been added to the route.To display the Route List,
showing all routes stored in
memory, select ‘Routes’ from
the Main Menu.
Select ‘New Route’ from the
Route Options and enter the
identifiers for the route way-
points in the sequence you
wish to follow them.
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Routes
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							To create a route from the map display:
1. Press MENU twice to display the Main Menu.
2. Highlight ‘Routes’ and press ENTER. The Route List is displayed, showing all routes
stored in memory.
3. Press MENU to display the Route Options.
4. Highlight ‘New Route ’ and press ENTER. The GPS III creates a route called 
‘EMPTY- 1’. (The name changes as you add waypoints to the route, so make note of 
the route name for future reference.)
5. Press MENU to display the New Route Options and highlight ‘Show Map’.
6. Press ENTER and use the rocker keypad to place the arrow over the first route way-
point. (Use the IN and OUT zoom keys to aid in locating the desired waypoint.)
7. Press ENTER to accept the selected route waypoint.
8. Highlight the next waypoint on the map display and press ENTER to add the waypoint to 
the route. Repeat this step until all route waypoints have been added to the route. 
Press PAGE or QUIT to exit the page.
9. You can also create route waypoints during this process. If no waypoint exists at the 
arrow location, the GPS III will automatically create one—using a three digit number 
as the waypoint’s name.  (You can rename the waypoint following the steps on page 46.)
10. If you wish to include a city location in the route, place the arrow over the city and 
press ENTER. A confirmation page will appear with the name of the city as a new way-
point (sometimes abbreviated, depending on the length of the original name). To add to 
the route, select ‘Use’ and press ENTER.
As you add each new waypoint to the route, the data window at the top of the map
display will show the name of the route you are creating, which includes the first and
last waypoints in the route. A solid route line will appear on the map to indicate each
leg, and a dotted line will appear to indicate the distance and bearing from the last
route waypoint to the cursor position.
To create a route directly from
the map display, select ‘New
Route’ from the Main Menu,
then select ‘Show Map’ from
the New Route Options.
You can add city locations to
a route by placing the editing
arrow on a city and pressing
ENTER.
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REFERENCE
Creating New Routes
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							The GPS III’s Route List displays all the routes currently stored in memory, 
along with a descriptive name for each route. Once a route has been created, it can
be activated and used for navigation from the Route List. A route may be followed in
the same sequence as it was originally created, or you can invert the route and nav-
igate from the end waypoint back to the beginning waypoint.
To activate a route:
1. Press MENU twice to display the Main Menu.
2. Highlight ‘Routes’ and press ENTER. The Route List is displayed, showing all routes 
stored in memory.
3. Highlight the desired route and press MENU to display the Route Options.
4. Highlight ‘Activate’ and press ENTER to navigate the route in sequence. 
To deactivate the route and stop using it for navigation:
1. Press PAGE repeatedly to display the Active Route Page. (See page 60.)
2. Press MENU to display the Active Route Options.
3. Highlight ‘Deactivate’ and press ENTER to stop navigating the currently selected route.
The Route List also allows you to enter your own 13-character name for any listed
route. By default the name includes the first and last waypoints in the route. 
To enter a custom route name:
1. Press MENU twice to display the Main Menu.
2. Highlight ‘Routes’ and press ENTER. The Route List is displayed, showing all routes 
stored in memory.
The Route List shows all
routes currently stored in
memory. Highlight the desired
route and press ENTER to see
the Route Plan Page.
Activating a route tells the
GPS III you wish to use this
route for navigation guidance.
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REFERENCE
Route List
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							3. Highlight the desired route and press ENTER to display the Route Plan Page.
4. Highlight the name field and press ENTER to begin editing.
5. Use the rocker keypad to enter the desired name and press ENTER when finished.
Route Editing
Once a route is added to memory you can review and/or edit the route from the
Route Plan Page. The Route Plan Page shows the sequence of waypoints for the select-
ed route and provides additional options to display the route layout on the map dis-
play, insert waypoints, remove waypoints or perform trip/fuel planning functions.
To edit a route:
1. From the Route List, highlight the route you wish to edit and press ENTER. The Route
Plan Page appears for the selected route.
2. To change a route waypoint, highlight the waypoint you wish to change and press
ENTER. Use the rocker keypad to enter the new waypoint and press ENTER.
3. To review the information for a route waypoint, highlight the desired waypoint and
press MENU. A pop-up menu appears with additional options. Highlight ‘Review Wpt’
and press ENTER to display information for the selected waypoint.
4. To insert a waypoint in the route, highlight the waypoint that will immediately follow the
new route waypoint and press MENU. A pop-up menu appears with additional options. 
Highlight ‘Insert Wpt’ and press ENTER to display a blank line for the new waypoint. 
Enter the name of the new waypoint, using the rocker keypad, and press ENTER.
5. To delete a waypoint from the route, highlight the waypoint you wish to delete and
press MENU. A pop-up menu appears with additional options. Highlight ‘Remove Wpt’
and press ENTER.
The Route Plan Page allows
for easy editing of an existing
route.
To edit a route, highlight the
route waypoint which is
affected by the change. If
inserting a waypoint, highlight
the waypoint which follows
the new waypoint.
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REFERENCE
Route List / Editing
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							6. To edit the route from the map display, press MENU from the Route Plan Page. 
Highlight ‘Show Map’ and press ENTER. Use the rocker keypad to place the cursor on 
the desired waypoint and press MENU. A pop-up menu appears. Select the desired
option and press ENTER. If ‘Move’ is selected, move the cursor to the desired location
and press ENTER to accept the change.
Route Planning
The Route Plan Page also displays trip planning information for each leg or the
entire route.  Available information includes desired course, time to waypoint, distance
to waypoint, required fuel and sunrise/sunset times at the waypoint location.
To use the trip planning features:
1. To select the desired planning figure, highlight the desired route from the Route List 
and press ENTER to display the Route Plan Page. One of ten available planning figures
appears to the right of each route waypoint. Use the LEFT/RIGHT keys on the rocker
keypad to select the desired item.
2. To enter planning information, Press MENU and select ‘Setup Plan’ from the options 
list. Enter the figures for speed, fuel flow, departure time and departure date. Press 
QUIT to return to the Route Plan Page.
NOTE: Fuel flow rates on your GPS III are measured in “units per hour”. System
setting changes for units of measure (statute, nautical or metric) do not affect the fuel
flow measure. You should enter fuel flow rates based upon available information for
your vehicle (operator’s manual, performance specifications, etc.) and make note of
the desired units of measure (gallons, liters, etc.)
The ‘Show Map’ option allows
you to change the route from
the map display. Place the
arrow on the point affected by
the change and press MENU.
With the Route Plan Page dis-
played, use the LEFT/RIGHT
keys on the rocker keypad to
select the trip planning features.Press MENU and select ‘Setup
Plan’ to define departure time,
fuel usage and speed.
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REFERENCE
Route Editing / Planning
#?
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							When a route is highlighted on the Route List, additional functions are available
from the Route Options.
To display the Route Options, press MENU (with the Route List 
displayed).
The following options are available:
New Route— allows you to create a new route, as described on page 54.
Activate Route— allows you to navigate the route in the same sequence it was 
originally created, as described on page 56.
Copy— allows you to copy the selected route to a new route. The copy function 
can be used to save a TracBack route for future use. The copy function is also 
useful for duplicating an existing route before making changes.
To copy a route:
1. Highlight the desired route on the Route List and press MENU.
2. Highlight ‘Copy’ and press ENTER. 
3. The Route Plan Page will appear for the duplicate route and the name for the new
route will be identical to the original, but followed by a number (e.g. ‘HOME-CAMP 1’).
Delete Route— allows you to remove the selected route from memory. The 
waypoints contained in the route will still appear in memory, but not as part of 
the route.
To delete a route from memory:
1. Highlight the desired route on the Route List and press MENU.
2. Highlight ‘Delete Route’ and press ENTER. A confirmation page will appear.
3. Press ENTER to delete the route (or QUIT to cancel). 
‘Copy’ allows you to make a
duplicate of a route before
making editing changes.
‘Delete’ will remove the select-
ed route from memory, but
not the waypoints contained
in the route.
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Route Options
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							Delete All— allows you to remove all routes from memory. The waypoints con-
tained in all stored routes will remain in memory, but not as part of any route.
To delete all routes from memory:
1. Highlight ‘Delete All’ and press ENTER. A confirmation page will appear.
2. Press ENTER to delete all routes (or QUIT to cancel). 
Active Route Page
The last page appearing in the main sequence (using the PAGE or QUIT keys) is
the Active Route Page. Whenever you have activated a route, GOTO, MOB or
TracBack, the Active Route Page will show each waypoint (by name) of the active
route, along with the desired course, distance to waypoint, time to each waypoint,
fuel requirements or sunrise/sunset times at each route waypoint. As you navigate the
route, the information on the Active Route Page will automatically update to indicate
the destination waypoint and any remaining interim waypoints—with the next point
along the route denoted by an arrow on the left-hand side of the screen.
From the Active Route Page you can change the name of the active route (see
page 56), review information on a route waypoint (see page 45) or bypass route way-
points and GOTO any waypoint in the route (see page 50). The user-selectable data
field on the right side of the page also keeps you informed of current conditions.
There are ten different data items available. See page 85 for data type descriptions.
To change the Active Route Page data, press the LEFT/RIGHT keys on
the rocker keypad.
The Active Route Page shows
the route currently being used
for navigation guidance. The
next waypoint in the route is
denoted by an arrow on the
left-hand side of the screen.
Selecting a GOTO destination
along the current route will
take you directly to that way-
point, then continue with the
remainder of the route.
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Route Options / Active Route
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							Many features of the GPS III are menu driven. Each of the main pages has an
options menu, allowing you to custom tailor the corresponding page to your prefer-
ences and/or select special features which specifically relate to that page.
To display the Active Route Page Options, press MENU (with the Active
Route Page displayed).
The following options are available:
Show Map— allows you to view the area around the active route. When select-
ed, ‘Show Map’ will show the map display centered around the first waypoint in
the active route.
Setup Plan— displays a trip planning screen, allowing you to plan and review
distance, fuel, time en route and sunrise/sunset information for the selected route.
To use the trip planning features:
1. Highlight ‘Setup Plan’ and press ENTER. The trip planning screen is displayed, show-
ing speed, fuel flow, departure time and departure date information.
2. Enter an hourly fuel flow (if desired) in the fuel field, using the same steps above. Fuel 
flow rate units (gallons, liters, etc.) are not specified on the GPS III. Enter these figures 
based upon available information for your vehicle and make note of the desired units.
3. Press QUIT to return to the Route Plan Page, then use the LEFT/RIGHT keys on the 
rocker keypad to review the planning information.
Re-evaluate— reactivates the current route and selects the route leg closest to 
your current position as the active leg. The active leg defines the current ‘from’ 
and ‘to’ waypoints.
To view each waypoint along
your route and the surround-
ing area, select ‘Show Map’
and use the panning arrow to
move along your route on the
map display.
‘Setup Plan’ allows you to
define planned speed, fuel
flow and departure time in
order to review trip planning
figures.
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Active Route Page Options
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							Deactivate— cancels navigation of the route you are currently using.
Invert— reactivates the current route in reverse order and navigates from the end
waypoint back to the beginning waypoint. See page 57.
Insert Wpt— allows you to insert an additional waypoint into the route, directly
in front of the currently highlighted waypoint in the route. If no route waypoint
is highlighted, this option is not available. See page 57 for route editing info.
Remove Wpt— removes the currently highlighted waypoint from the route. If no
waypoint is highlighted, this option is not available. See page 57 for route editing
information.
Review Wpt— allows you to view information for the currently highlighted way-
point in the route. If no route waypoint is highlighted, this option is not available. 
See page 45 for waypoint review information.
Delete Route— allows you to remove the current route from memory. The way-
points contained in the route will still appear in memory, but not as part of the
route. See page 59.
‘Re-evaluate’ will reactivate
the current route and select
the closest leg. This feature is
handy if you stray well off
course and later wish to
return to the route.
To reverse the sequence of
waypoints in the active route,
select the ‘Invert’ option.
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Active Route Page Options
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