CVS-833/833C
Chapter 5
Basic Operation
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5-19
When used as a Bottom Alarm:
An audio alarm sounds when the sea bottom touches or falls within the alarm bar. The following points
should be considered:
(1) The minimum alarm length is 3 % of the depth range in use.
(2) Alarm bar length should be determined according to the profile of the sea bottom.
When used as a Fish Alarm:
An audio alarm sounds when a school of fish enters the alarm bar. The alarming condition is
determined according to the length and color of a school of fish. The following points should be
considered:
(1) The length of the alarm bar should be decided according to the thickness of a school of fish.
(2) The color that activates the alarm should be decided according to a predominant color of a school
of
fish.
CAUTION: The audio alarm will automatically stop in the following conditions:
1. When an object leaves the alarm.
2. When the alarm bar is removed from the display.
3. When the alarm bar disappears due to the alarm depth range changing.
4. When the upper depth is set to the same depth as the lower depth of the alarm bar.