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Modelets 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.
Speedlets you select a simulated speed when the simulator is enabled.
Track Controlallows 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.
Trackallows you to manually enter a track heading. This setting is only available when
Track Control is set to ‘User Track’.
Altitudeallows 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
The ‘Track Control’ setting
allows the simulator to
automatically “line up” on the
correct bearing to a
Setup Menu: Simulator
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Backlightlets 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.
Batteryis 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).
Contrastlets you adjust the screen for optimum viewing in all lighting conditions. Screen
contrast is set using an on-screen bar scale. Contrast can also be set from the Satellite
Status Page, as described on page 25.
To set the screen contrast:
1. Highlight the ‘Contrast’ field and press ENTER.
2. Use the LEFT/RIGHT keys on the rocker keypad to select desired level and press ENTER.
Displayallows you set the display orientation to horizontal (‘Landscape’) or vertical
NOTE: Display orientation can also be changed by pressing and holding the PAGE key.
You can adjust the screen
contrast from the Satellite
Status Page or from the
Display orientation is
adjustable by pressing/holding
the PAGE key or from the
Setup Menu: System
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Distance & Speedlets you select the desired units of measure for distance and speed
readouts in ‘Nautical’, ‘Statute’ or ‘Metric’ terms.
Headinglets 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 posi-
tion formats described on page 74). ‘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.
Altitudelets 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 vari-
ation as your position changes. Using this setting, the GPS III will not automatically cal-
culate 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.
Setup Menu: Units
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User Timerlets 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 andenter the count duration using the rocker keypad. Press ENTER to accept., then—with the left-handcolumn 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 Timerprovides 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 Midnightprovides a running count of how long the GPS III has been in operation
since midnight of the current day.
Since Factory Resetprovides 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
The battery timer will auto-
matically reset when depleted
batteries are replaced with a
Setup Menu: Timers
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Time Formatallows 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 Zoneis used to define the current local time. UTC date and time are calcu-
lated 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.
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.
Timedisplays the current time based on the settings made above and information
provided by the satellites received.
Datedisplays 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.
Setup Menu: Time
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