A-Scope Display (Single Display Only) - Furuno GP-3500F-D Operator's Manual

11. VIDEO SOUNDER OPERATION
11.2.7

A-scope display (Single display only)

The A-scope display, available in all modes, shows echoes at each transmission
with amplitudes and tones proportional to their intensities, on the right 1/3 of the
screen. It is useful for estimating fish species and seabed composition.
Normal
display
11-6
10.0 kt
5.6 °C AUTO C
0
1'50"
20
40
60
53.6
80
m
50k
A-scope display
A-SCOPE DISPLAY
17.6
Weak echo
(small fish school
or noise)
Fish school
Strong echo
(Bottom)