2. HORIZONTAL MODE
2-24
<<ALARM ZONE SETTING>>
PLACE CURSOR AT STARTING POINT
AND PRESS MENU KEY TO SET.
PRESS R/B KEY TO CANCEL.
<<ALARM ZONE SETTING>>
PLACE CURSOR AT ENDING POINT
AND PRESS MENU KEY TO
COMPLETE ALARM ZONE SETTING.
Figure 2-31 How to set the fish alarm zone
Note 1:
There must be at least three degrees difference between the starting
and ending points to get a fan-shaped alarm zone as shown in (a) and
(b) below. Otherwise, the unit paints a 360-degree alarm zone as in (c)
where there is less than 3 degrees between the starting and ending
points and (d) where the bearing marker has been rotated one full turn.
More than 3˚
Within 3˚
(a)
(b)
(c)
(d)
Figure 2-32 How to create desired alarm zone
Note 2:
The echo strength which triggers the alarm can be set with ALARM
LEVEL on the FISH ALARM & AUDIO menu.
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