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the MENU key, then select the “ALARMS/CDI” menu. A screen similar to
the one shown at right appears. Press the up or down arrow key to move
the black box to the desired alarm, then press the right arrow key to turn
it on.
To adjust an alarm’s distance, move the black box to the alarm’s “DIST”
menu item, then press the right or left arrow keys to increase or decrease
the alarm’s distance.
When you’re finished adjusting the alarms, press the EXIT key to erase
this menu.
Important Alarm Notes:
Anchor Alarm - Since civilian users don’t receive the accuracy given to
military users, the anchor alarm may sound even when you’re sitting
still. This typically happens when using small (less than .05 mile) an-
chor alarm ranges. If you have a DGPS beacon receiver connected to
the GlobalNav 310, smaller ranges may be usable.
Arrival Alarm - If you set the arrival alarm’s distance to zero (0), and
you run a route (see the routes section), the GlobalNav 310 may not
show navigation data to the next waypoint, once you arrive at the first
one. If you use the routes feature, never set the arrival alarm to zero.
MESSAGES
On the GPS Alarms menu are the position and DGPS message selec-
tions. When turned on, the position message appears for a few seconds
whenever the GlobalNav 310 locks onto the satellites and shows a posi-
tion. It also appears when the unit loses the lock onto the satellites and
cannot navigate. Pressing the EXIT key erases these messages.
The DGPS message appears whenever the unit begins or stops using
DGPS data to help determine your position.
The default setting for these messages is “on”. To turn either message
off, select the “GPS Alarms” menu from the main menu, then move the
black box to the desired message and press the left arrow key. Press the
EXIT key to erase this screen.
BACKLIGHT
The AirMap’s display and keyboard have lights that can be turned on for
night use. To turn the lights on, simply press the PWR key. To turn them
off, press the PWR key again.