10. VIDEO SOUNDER OPERATION
10-24
10.15 Interpreting the Sounder Display
This section provides, using typical examples, information necessary for interpreting
the display.
Typical display
Color bar
The color bar shows the relation between echo intensity and echo color on the screen.
The top color (reddish brown) is the strongest color and the lower colors the weakest.
The bar can be used as a reference to estimate density of a fish school, fish species
and hardness of the bottom.
Color bar
LF
49.6
1/1
m
0.0
20
40
60
80
0
0
Surface
noise
Color bar
Bottom
Zero line
Fish school
R-BRN
RED
ORANGE
YELLOW
GREEN
LIGHT-BLUE
BLUE
DEEP BLUE
Weak
Strong
No signal
49.6
m
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