2. HORIZONTAL MODE
2-46
2.23 Interpreting the Horizontal Display
This section provides information necessary for interpreting the horizontal
display.
Bottom echoes
When the tilt angle is changed, the bottom echo illustrated below will appear on
the display. When the tilt is decreased (toward 0
°)
, the bottom trace becomes
wider and weaker. By observing the bottom condition on the display, the skipper
can prevent net damage.
(A) Flat bottom
Tilt angle: 10˚ to 15˚
(B) Flat bottom
Tilt angle: 20˚ or more
(C) Sloping bottom
Tilt angle: 20˚ or more
Bottom
Shallow bottom
is displayed in
a strong color
and with a
short tail.
Bottom is displayed
narrower and in
stronger colors when
compared to (A).
Decreased tilt angle
Only half of
vertical beam width
captures the bottom.
The deeper, sloping
bottom echo is displayed
in a weak color and
with a long tail.
Bottom echoes
Summary of Contents for FSV-30
Page 1: ...COLOR SCANNING SONAR FSV 30 ...
Page 14: ...This page is intentionally left blank ...
Page 30: ...1 OPERATIONAL OVERVIEW 1 16 This page is intentionally left blank ...
Page 80: ...2 HORIZONTAL MODE 2 50 The page is intentionally left blank ...
Page 100: ...3 VERTICAL MODE 3 20 The page is intentionally left blank ...
Page 122: ...5 6 This page is intentionally left blank ...
Page 136: ...7 10 This page is intentionally left blank ...
Page 152: ...8 OTHERS MENU 8 16 This page is intentionally left blank ...
Page 170: ...10 MAINTENANCE TROUBLESHOOTING 10 14 This page is intentionally left blank ...
Page 174: ...SP 4 This page is intentionally left blank ...
Page 182: ...ORIGINAL SETTING AP 8 New Original setting ...
Page 183: ...ORIGINAL SETTING AP 9 ...
Page 184: ...ORIGINAL SETTING AP 10 ...
Page 185: ...ORIGINAL SETTING AP 11 Color setting ...
Page 186: ...ORIGINAL SETTING AP 12 Color Response Curve setting ...