Eagle Electronics Cuda 250i - Manual (Page 139)

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Section 8: GPS Setup Options
Alarms
This unit has several GPS alarms. The default setting has all the
alarms turned on. You can turn the alarms off and on and change their
distance settings.
You can set an arrival alarm to flash a warning message and sound a
tone when you cross a preset distance from a waypoint. For example, if
you have the arrival alarm set to 0.1 mile, then the alarm will flash a
message when you come within 0.1 mile of the recalled waypoint.
The off course alarm warns you 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 0.1 mile, then the alarm flashes a message if you drift
0.1 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 0.1 mile as an example, if you are anchored and your
boat moves more than 0.1 mile, the alarm will flash a message and
sound a tone.
Alarms command (left); GPS alarm menu (right) with Arrival Alarm
and Off Course Alarm turned on (checked).