Garmin 3 Plus Manual

							To clear the reference field 
(and use your present position 
instead) press LEFT side of 
the ROCKER KEYPAD until 
the reference waypoint field 
becomes blank, then press 
ENTER.
City Spell ‘n Find Options (cont.)
To select between size information and a reference waypoint field: 
           1.  Select ‘Show City Size’ or ‘Show Reference’ (as appropriate) and press ENTER. (When one of the 
options is selected, the other option will appear on the City Spell ‘n Find Options menu.)
           2.  If ‘Show Reference’ is selected, the City Spell ‘n Find Page will reappear.
To enter a reference waypoint and display the bearing and distance from the 
waypoint to the selected city: 
           1. Select the ‘Show Reference’ option, as described above.
           2.  With the cursor highlighting the reference waypoint field, press ENTER to begin entering the 
reference waypoint name.
           3.  Use the ROCKER KEYPAD to enter the name of the reference waypoint and press ENTER when 
finished. The bearing and distance from the reference waypoint to the city location will appear at 
the bottom right corner of the screen.‘Show Reference’ allows you 
to display bearing and dis-
tance (from any waypoint you 
have stored in memory) to the 
selected city.
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Main Menu
        Nearest—  displays  up  to  nine  nearest  waypoints  and  50  nearest  cities  within 
       200  miles  of  your  present  position,  along  with  50  exits  on  the  nearest  interstate 
       highway. See page 53.
Routes— allows you to create, edit, activate or delete routes. See pages 60-64.
Track  Log—  lets  you  specify  whether  or  not  to  record  a  track  log  (an  electronic 
       ‘breadcrumb  trail’  recording  of  your  path),  define  how  it  is  recorded  or  save  track 
       log data for future use. The Track Logs Page also provides an indicator of the mem-
       ory  used  for  the  active  track  log  and  options  to  clear  the  track  memory  or  start  a 
       TracBack route. See pages 58-59 for TracBack information.
The Track Logs Page is divided in two main sections: one for the active log (the log 
currently  being  recorded)  and  available  memory,  and  the  second  section  showing 
any  saved  track  logs  and  the  total  number  saved.  The  active  log  stores  up  to  1900 
track log positions, based upon the criteria specified in the Track Log Options. Up to 
10 additional track logs may be saved in memory, with up to 250 track log positions 
in each saved log. You may also choose to display/not display the saved log. 
						

							Track Log Settings
To view the Track Log Options, highlight ‘Active Log’ or any of the ‘Saved Logs’ 
(on the Track Logs Page) and press MENU.
The following options are available:
TracBack converts the track log data in memory into an inverted route (of up to 30 
waypoints) and begins navigation along the route. See pages 58-59.
Save Active Log extracts up to 250 of the most significant points along the active log, 
saves this information as a ‘saved log’, and clears the active log. Up to 10 saved logs may 
be stored in memory, along with a 13-character name. The default name is the date the 
log was saved, but you can specify any name you wish.
To rename a saved log: 
           1. Highlight the saved log you wish to rename and press ENTER. An information box appears, show-              ing the name of the saved log, the number of points in the track log and the total distance covered.
           2. Highlight the track log name field and press ENTER.
           3. Use the rocker keypad to enter the new name for the saved log. Press ENTER when finished.
Clear Active Log / Delete Saved Log clears the selected track log, active or saved, from 
memory. Highlight the ‘Active Log’ to display the ‘Clear Active Log’ option, or highlight 
any of the ‘Saved Logs’ to display the ‘Delete Saved Log’ option. You should select the 
‘Clear Active Log’ option at the beginning of any trip where you’ll want to convert the 
track log data into a TracBack route. See pages 58-59.
To delete a track log: 
           1. Highlight the track log you wish to delete (active or saved) on the Track Logs Page, and press 
              MENU to display the Track Log Options.
           2. Highlight ‘Clear Active Log’ or ‘Delete Saved Log’ and press ENTER.
           3. Press ENTER again to confirm (or press QUIT to cancel).
The Track Logs Page shows 
available memory for the 
active log (the log currently 
being recorded) and lists any 
saved track logs.
From the Track Logs Page, 
press MENU to view the 
Track Log Options.
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Main Menu: Track Logs 
						

							Track Log Settings (cont.)
Delete All allows you to clear all track logs, active and saved, from memory.
To delete all track logs from memory:
           1. Select ‘Delete All’ from the Track Log Options and press ENTER.
           2. Press ENTER again to confirm (or QUIT to cancel).
Setup Logging provides a setup screen to define how track log data will be recorded. The 
Setup Logging Page provides options for ‘Record Mode’, ‘Interval’ and ‘Interval Value’.
        Record Mode lets you select one of three track recording options:
           ‘Off ’ – No track log will be recorded.
           NOTE: Selecting ‘Off ’ may prevent you from using the TracBack feature.
           ‘Fill’ – A track log will be recorded until the track memory is full.
           ‘Wrap’ (default) – A track log will be continuously recorded, wrapping through
           available memory; replacing the oldest track data with new data.
        Interval defines the frequency with which the track plot is recorded. Three 
         interval settings are available:
           ‘Resolution’ (default) – Records track log based upon a user-defined variance 
           from your course over ground. The resolution option is recommended for the 
           most efficient use of memory and TracBack performance. The distance value 
           (entered in the ‘Interval Value’ field) is the maximum left/right deviation 
           allowed from the last defined ground track before recording a new point.
           ‘Time’ – Records track log based on a user-defined time interval.
           ‘Distance’ – Records track log based on a user-defined distance between points.
        Interval Value defines the distance or time interval used to record the track log.Select ‘Save Active Log’ to save 
the active log data for future 
use. This process extracts the 
most significant points along 
the active route (up to 250) 
and creates a ‘saved log’.
The ‘Setup Logging’ option 
allows you to change the 
criteria used to record the 
active track log.
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Main Menu: Track Logs
H 
						

							Trip Computer— provides readouts for average speed, maximum speed, odometer, 
trip  odometer  and  trip  timer.  These  readouts  can  be  reset  from  the  Trip  Computer 
Options.
To reset a trip computer readout(s):
           1. Press MENU (with the Trip Computer Page displayed). An options list is displayed.
           2. To reset all trip computer readouts, highlight ‘Reset All’ and press ENTER. 
           3. To reset a single readout item, highlight the desired option and press ENTER.
           4.  To log trip time only while moving, highlight ‘Use Time Moving’ and press ENTER. If this 
option is selected, ‘Use Total Time’ will appear instead. This latter option logs trip time any 
time the GPS III+ is on and has a position fix.
    
NOTE: The ‘Reset Trip’ option resets trip odometer, trip timer and average speed readouts.
Setup—  provides  a  group  of  pages  to  perform  various  system  setup  functions, 
including  selection  of  position  format,  units  of  measure,  setting  various  alarms, 
configuring the display orientation and backlighting. Each available page is denoted by 
a ‘file tab’ which identifies the function of that page. 
‘Trip Computer’ provides 
readouts for the trip odometer, 
trip timer, average speed and 
maximum speed. Options are 
provided to reset these figures.
The ‘Setup’ option uses file 
tabs (across the top of the 
page) for quick selection/ 
review of unit settings.
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Main Menu / Setup Menu
Track Log Settings (cont.)
Displayed  on  Map/Not  Displayed—  allows  you  to  control  if  a  saved  track  log 
is displayed on the map page.
To display/not display a saved track log:
1.  Highlight a saved track log from the Track Logs list and press ENTER. This will display 
the details of the saved track log. (You may also change the name of the track log or 
start a TracBack from this page.)
2.  Press MENU, then with Display Options highlighted, press ENTER. Choose the desired 
display option and press ENTER. 
						

							To display the desired 
information, highlight the 
appropriate file tab (using 
the LEFT/RIGHT keys on the 
rocker keypad).
Once the desired tab is select-
ed, use the UP/ DOWN keys 
on the rocker keypad to select 
the desired item on the page.
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Setup MenuTo select a Setup option, highlight the file tab for the desired function. 
The information is automatically displayed when the file tab is highlighted.
The file tab headings and setup functions for these pages are: 
  Simulator    Enable/Disable; Settings for simulated Track, Speed 
      and Altitude
  System    Backlight timeout, Battery type, Power Saver Mode
      and Display Orientation
  Units  Units of measure settings for – Distance & Speed, 
    Heading and Altitude
           Timers           Count up/down User Timer, Battery Timer, and
                                      usage timers for current day and since new
           Time             Formats for local 24 hour, local 12 hour (AM/PM) or
                                      UTC; Difference setting from UTC to local time
           Alarms          Alarm Clock, Arrival Alarm, Off Course Alarm
           Position         Position Format (latitude/longitude, UTM/UPS,
                                      Maidenhead, regional grids); Map Datum selection
           Interface        Format (NMEA, RTCM, GARMIN proprietary); 
                                      Mode setting for use with PC or a second unit
The  following  pages  describe,  in  more  detail,  the  available  settings  for  each 
Setup file tab item. 
						

							Simulator Settings
Mode lets you turn the built-in simulator on or off.
To enable/disable the built-in simulator:
           1. Highlight the ‘Mode’ field and press ENTER.
           2. Select ‘Simulator Off’ or ‘Simulator On’ (as desired) and press ENTER.
Speed lets you select a simulated speed when the simulator is enabled.
Track Control allows the built-in simulator to automatically align track heading to the 
desired course (when using a GOTO or route), or allows you to manually adjust the 
track heading, as desired.
Track allows you to manually enter a track heading. This setting is only available when 
Track Control is set to ‘User Track’.
Altitude allows you to specify a user-defined altitude for your simulated position.
To select a simulator setting:
           1. For track control, highlight the ‘Track Control’ field and press ENTER. Select ‘Auto Track’ or
              ‘User Track’ and press ENTER.
            2. For simulated speed, user track, or altitude, highlight the desired field and press ENTER. Enter
               the desired value using the rocker keypad and press ENTER when finished.
‘Simulator’ allows you to 
configure the built-in 
simulator feature.
The ‘Track Control’ setting 
allows the simulator to 
automatically “line up” on 
the correct bearing to a 
destination waypoint.
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Setup Menu: Simulator 
						

							System Settings
Backlight lets you keep the screen/keypad backlighting on continuously (‘always on’) 
when selected, or enable the automatic shutoff to preserve battery life. Automatic shutoff 
times from 15 seconds to 4 minutes (since last key press) are available.
To set the backlight timeout:
           1. Highlight the ‘Backlight’ field and press ENTER.
           2. To keep backlighting on continuously, select ‘Always On’ and press ENTER, OR
           3. To set a timeout duration, select the desired time period and press ENTER.
Battery is used to designate the type of batteries currently being used to power your GPS 
III+: Alkaline, Lithium or NiCad. This setting ensures accurate readings from the battery 
gauge on the Satellite Status Page (see page 27).
Power Saver is suitable for most applications and offers position updates which adapt to 
your needs while extending battery life. The GPS III+ will operate up to 36 hours when 
using Power Saver mode.
To select power saver mode:
           1. Highlight the ‘Power Saver’ field and press ENTER.
           2. Use the UP/DOWN keys on the ROCKER KEYPAD to select ‘ON’ (or ‘OFF’) and press ENTER.
Display allows you set the display orientation to horizontal (‘Landscape’) or vertical 
(‘Portrait’).
NOTE: Display orientation can also be changed by pressing and holding the PAGE key.
Set the ‘Backlight’ field to 
‘Always On’ to prevent the 
backlighting from timing out 
and turning off automatically.
Display orientation is adjust-
able by pressing and holding 
the PAGE key, or from the 
‘System’ settings.
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Setup Menu: System 
H 
						

							Units Settings
Distance & Speed lets you select the desired units of measure for distance and speed 
readouts in ‘Nautical’, ‘Statute’ or ‘Metric’ terms.
Heading lets you select the reference used in calculating heading information. You can 
select from ‘Auto Mag Var’, ‘True’, ‘Grid’ and ‘User Mag Var’. ‘Auto Mag Var’ provides 
magnetic north heading references which are automatically determined from your current 
position. ‘True’ provides headings based upon a true north reference. ‘Grid’ provides 
headings based on a grid north reference (and is used in conjunction with the grid 
position formats described on page 82). ‘User Mag Var’ allows you to specify the magnetic 
variation at your current position and provides magnetic north heading references based 
upon the variation you enter.
Altitude lets you select altitude readouts in ‘Feet’ or ‘Meters’.
To select a units setting:
           1. Highlight the desired field and press ENTER to display the available options.
           2. Select the desired option and press ENTER.
           3. If ‘User Mag Var’ is selected in the ‘Heading’ field, highlight the heading reference field (immed-
              iately to the right) and press ENTER. Enter the magnetic variation at your current position using 
              the rocker keypad and press ENTER.
WARNING: If ‘User Mag Var’ is selected, you must periodically update the magnetic 
variation as your position changes. Using this setting, the GPS III+ will not automatically 
calculate and update the magnetic variation at your present position. Failure to update 
this setting may result in substantial differences between the information displayed on 
your GPS III+ and external references, such as a magnetic compass.
Select nautical, statute or 
metric units of measure from 
the ‘Units’ settings.
The ‘User Mag’ option allows 
you to define the magnetic 
variation for your area. ‘Auto 
Mag Var’ is the preferred set-
ting in most cases.
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Setup Menu: Units
I 
						

							Timers Settings
User Timer lets you select a count up or count down timer. For a count down timer you 
may also specify the count down duration.
To select a user timer setting:
           1. For a count down timer, highlight the ‘User Timer’ field in the right-hand column, press ENTER and
              
enter the count duration using the rocker keypad. Press ENTER to accept., then—with the left-hand
               column highlighted—press ENTER to view the User Timer options. Select ‘Down’ and press ENTER.
           2. For a count up timer, highlight the ‘User Timer’ field in the left-hand column, press ENTER and
              select ‘Up’. Press ENTER to confirm.
           3. To reset the timer or turn the timer off, highlight the ‘User Timer’ field in the left-hand column, 
              press ENTER and select ‘Reset’ or ‘Off’ (as appropriate). Press ENTER to confirm.
Battery Timer provides a running count of how long the GPS III+ has been in operation 
with the current batteries. The timer automatically stops when using an external power 
source. The timer will automatically reset when depleted batteries are replaced, but can 
also be manually reset.
To select a battery timer setting:
           1. Highlight the ‘Battery Timer’ field in the left-hand column and press ENTER.
           2. Select ‘Off’, ‘On’ or ‘Reset’ (as appropriate) and press ENTER.
Since Midnight provides a running count of how long the GPS III+ has been in operation 
since midnight of the current day. 
Since Factory Reset provides a running count of total GPS III+ operating time since the 
receiver was shipped from the factory.
The ‘User Timer’ option pro-
vides both count up and count 
down timers.
The battery timer will auto-
matically reset when depleted 
batteries are replaced with a 
fresh set.
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Setup Menu: Timers 
						

							Time Settings
Time Format allows current time to be displayed using a 12- or 24- hour clock. This 
field is also used to select between local and UTC time readouts.
To select a time format:
          1. Highlight the ‘Time Format’ field and press ENTER to display the available options.
          2. Select ‘Local 24hr’ or ‘Local 12hr’ to display local time references. ‘Local 12hr’ will show current
              time using a traditional AM/PM format, OR
          3. Select ‘UTC’ to display universal time references (also referred to as ‘Greenwich’ or ‘zulu’ time).
Local Time Zone is used to define the current local time. UTC (also called Greenwich 
time) date and time are calculated directly from the satellites’ signals and cannot be 
edited. If you prefer to use local time, you may designate an offset, either ‘Behind UTC’ or 
‘Ahead of UTC’. The offset is the difference, in hours and minutes, between local time and 
UTC time. See the table on page 97 for time offsets.
To enter the local time zone:
          1. Highlight the ‘Local Time Zone’ field and press ENTER.
   
       2. Select the desired offset amount (in hours and minutes) using the rocker keypad and press ENTER.
          3. Highlight the offset direction field (immediately to the right) and press ENTER.
          4. Select ‘Behind UTC’ or ‘Ahead of UTC’ (as appropriate) and press ENTER.
Time displays the current time based on the settings made above and information 
provided by the satellites received.
Date displays the current date based on the settings made above and information 
provided by the satellites received.
Enter an offset amount to 
adjust the time display to 
your local area. In the United 
States, all offset amounts will 
be ‘Behind UTC’.
If you’re unsure of the exact 
offset, select a ‘Local’ time 
format, then enter offset 
values until you arrive at the 
correct local time.
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Setup Menu: Time