ALARMS
This unit has several GPS alarms. (Sonar alarms are covered in the sonar section of this manual.) You can set an arrival alarm to flash a warn- ing message and sound a 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 flash a message when you come within .1 mile of the re- called waypoint. The course deviation indicator alarm (CDI) can warns when your track drifts too far to the right or left of the course line to the waypoint. For example, if the alarm is set to .1 mile, then the alarm flashes a message if you drift .1 of a mile or more to the right or left of the line to the waypoint. The anchor alarm is triggered 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 flash a mes- sage and sound a tone.
To use any of these alarms, first press the MENU key twice, then select the “Alarms” menu. Next, select “GPS Alarms”. A screen similar to the one shown at right appears. Press the up or down arrow key to select the desired alarm, then press the ENT key to turn it on or off.
To adjust an alarm’s distance,
highlight the alarm’s “Distance” menu, then press the ENT key to select it. Use the arrow keys to increase or decrease the alarm’s distance.
When you’re finished, 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 be triggered even when you’re sit- ting still. This typically happens when using small (less than .05 mile) anchor alarm ranges. If you have a DGPS beacon receiver connected to this unit, smaller ranges may be usable.
Arrival Alarm - If you set the arrival alarm’s distance to a small number, and you run a route (see the routes section), this unit may not show navi- gation data to the next waypoint, once you arrive at the first one, since you may not be able to come close enough to the first waypoint to trip the arrival alarm.
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