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the necessary satellites, but it usually takes less time. Remember, when it
does, your local time and possibly date can be wrong. Use the method
shown in the initialization section at the front of this manual to change
them, if needed. Once this is done, an internal clock will keep the correct
time, even when the unit is turned off. The GPS system updates this clock
when the unit is locked on to the satellites.
ALARMS
The AccuMap 12 has several alarms. You can set an arrival alarm to sound
a warning tone when you cross a preset distance from a waypoint. For
example, if you have the arrival alarm set to .1 mile, then the alarm will
sound when you come within .1 mile of the recalled waypoint. The course
deviation indicator alarm (CDI) can sound a warning when your track drifts
too far to the right or left of the line to the waypoint. For example, if the
alarm is set to .1 mile, then the alarm will sound if you drift .1 of a mile or
more to the right or left of the line to the waypoint. The anchor alarm
sounds a warning when you drift outside of a preset radius. Again, using
the .1 mile as an example, if you’re anchored and your boat moves more
than .1 of a mile, the alarm will sound.
To use any of these alarms, first press the MENU
key, then select the “GPS ALARMS” menu. A
screen similar to the one shown at the top of the
next page appears. Highlight the desired alarm,
then press the right arrow key to turn it on.
To adjust the alarm’s distance, move the black box
to the alarm’s “DIS” menu item, then press the right
or left arrow keys to increase or decrease the
alarm’s distance.
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) anchor alarm
ranges. If you have a DGPS beacon receiver connected to the AccuMap
12, 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 AccuMap 12 may not show navi-
gation 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.