Furuno CSH-5L/CSH-8L manual Fish School, Fish echoes, A Sea surface fish, Bottom, Fish school

6. INTERPRETING THE DISPLAY

6.2Fish School

A fish school appears as a mass of echoes. The color of the mass shows the density. To know the distribution and center point of a fish school, choose several different tilt angles.

(A) Sea surface fish

Tilt angle: 0˚ to 10˚

Fish school

Sea surface reflections

(B) Midwater, bottom fish Tilt angle: 30˚ or more

Fish echo which appears before bottom can be detected.

Bottom

Tilt angle: 0˚ to 20˚

Fish echo which appears together with or after bottom can be detected.

Fish school

Bottom echo not displayed because

of decreased tilt angle. Sea surface reflections are present.

Fish school

Large midwater fish school is present.

Bottom

To search bottom fish, use a narrow tillt angle so the bottom echo will be weak, enabling you to see bottom fish echoes.

Fish echoes

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