2. HORIZONTAL MODE
2-41
School of fish
A school of fish appear as a mass of echoes on the screen. By this display pattern, the
density of the school on the sonar beam can be found. To find distribution and center
point of a school of fish, try several different tilt angles.
(A) Sea surface fish
Tilt angle: 0° to 10°
(B) Midwater, bottom fish Tilt angle: 30° or more
Fish echo which appears before bottom can be detected.
Tilt angle: 0° to 20°
Fish echo which appears together with
or after bottom can be detected.
Bottom
Sea surface
reflections
School
of fish
Bottom echo not
displayed because
of decreased tilt angle.
Sea surface
reflections are
present.
.
Bottom
When the tilt angle is shallow,
the reflection echo from bottom
is weak and the fish echo that
appears from bottom is easy to find.
School
of fish
School of fish
Bottom echo
clearly displayed.
Summary of Contents for FSV-2S
Page 1: ...COLOR SCANNING SONAR FSV 25 FSV 25S OPERATOR S MANUAL www furuno com Model ...
Page 14: ...SYSTEM CONFIGURATION xii This page is intentionally left blank ...
Page 74: ...2 HORIZONTAL MODE 2 44 This page is intentionally left blank ...
Page 92: ...4 NUMERIC GRAPHIC DATA DISPLAY 4 4 This page is intentionally left blank ...