2. HORIZONTAL MODE
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4. Select [Audio Sector] then push the left click button.
5. Select desired sector then push the left-click.
6. Select [Quit] on the setting box then push the left-click button
to close the box.
7. Long-press the MENU/ESC key to close all menus.
2.13.3 Automatic training
You may automatically scan the audio sector and audio bearing
mark in the sector of 12°, 24° or 36° as shown below.
1. First activate the range and audio bearing marks with the R/B AUDIO key.
2. While pressing and holding down the AUTO TRAIN key, press the R/B AUDIO
key to select desired auto train sector among 12°, 24° or 36°, or OFF to disable
automatic training.
Watch the auto train mark to know the currently selected sector. The chosen sec-
tor appears in large characters for five seconds at the top of the screen.
Note: Select [Off] at step 2 to stop the training.
2.13.4 Reverberation for audio signal
You may choose the length of reverberation of the audio signal, with [Reverberation]
on the [Alarm & Audio] menu. The larger the value the longer the reverberation, which
makes it easier to hear the audio signal. The setting range is 0-9 and the default set-
ting is 0.
2.14 Fish Alarm
The fish alarm sounds the aural alarm when a fish echo above a preset strength enters
the operator-set alarm zone.
1. Press the MENU/ESC key to show the main menu.
2. Select [Others] then push the left-click button.
3. Select [Alarm & Audio] then push the left-click button.
4. Select [Fish Alarm] then push the left-click button.
5. Select [ON] then push the left-click button.
6. Select [Quit] from the setting box then left-click to close the box.
7. Select [Alarm Zone] then push the left-click button.
Audio bearing
mark
Auto train mark
Auto train secto
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