Detecting Fish Schools Aurally - Furuno CH-37 Operator's Manual

Furuno color sector scanning sonar operator's manual model ch-37

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2.7 Detecting Fish Schools Aurally

Occasionally you will be preoccupied with other tasks and un-

able to concentrate on watching the sonar picture. In such cases

it would be a good choice to use the audio function. This func-

tion enables you to monitor echoes from fish schools and bot-

tom through the external speaker (option), of which the volume

can be adjusted with the AUDIO control on the sub panel 1.

After you become accustomed to utilizing the audio function,

you should be able to detect a fish school from a range longer

than you can detect it on the screen. In addition you may judge

whether the fish schools is approaching or going away; the

tone becomes higher when the fish is approaching and lower

when going away.

2-9

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