Automatic Training; Reverberation For Audio Signal; Fish Alarm; How To Set The Fish Alarm - Furuno FSV-25 Operator's Manual

2. HORIZONTAL MODE
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 1: The automatic training is inoperative when the target lock function is active.
Turn off the target lock function to use automatic training.
Note 2: Select [Off] at step 2 to stop the training.
2.13.4

Reverberation for audio signal

You may select 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 to 9 and the default
setting 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.
2.14.1

How to set the fish alarm

1. Press the MENU/ESC key to show the main menu.
2. Click [Others].
3. Click [Alarm & Audio].
4. Click [Fish Alarm].
5. Click [ON] to turn on the alarm, or [OFF] to turn off the alarm.
6. Click [Quit] from the setting box then left-click to close the box.
7. Click [Alarm Zone].
8. Operate the trackball to place the cursor on the starting point of the alarm zone
then push the left button.
2-24
Auto train mark
Auto train sector
A
Audio bearing
mark