Furuno CSH-53 manual Fish Alarm, How to set the fish alarm zone

The Fish Alarm

The fish alarm sounds an audible alarm when a fish echo above a preset strength enters an alarm zone. You set parameters for the fish alarm at ALM on the data setting window.

ON/OFF: Turn alarm on or off.

Level:	Set echo strength level which will activate the alarm.
Zone:	Set alarm zone.

1.Open the data setting window and select ALM•AUDIO.

2.Press the + key of the ZONE item.

3.Operate the trackball to place the trackball mark on the start- ing point of the alarm zone.

4.Press the + key.

5.Rotate trackball clockwise to select the end point. The dis- play paints a fan-shaped alarm zone.

6.Press the + key.

Starting

point

Alarm zone

End point

Figure 7-6 How to set the fish alarm zone

Note: There must be at least three degrees difference between the starting and end points to get a fan-shaped alarm zone as shown in (a) and (b). Otherwise, the unit paints a 360 degree alarm zone as in (c) and (d).

More than 3°

(a)(b)

Within 3°

(c)(d)

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