Humminbird 597ci - Manual (Page 83)

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Drift Alarm
Drift Alarm allows you to set the size of a perimeter
around the boat’s anchored position. If the anchored boat drifts outside of that
perimeter, the Drift Alarm will sound.
To change the Drift Alarm setting:
1. Highlight Drift Alarm on the Alarms main menu.
2. Press the LEFT or RIGHT Cursor keys to change the Drift Alarm setting.
(Off, 25 to 3000 feet, 10 to 1000 meters [International Models only],
Default = Off)
Drift Alarm Perimeter
Drift
Alarm
Circle
Alarms Menu Tab