7. FISH FINDER (SOUNDER)
7-6
7.3.5 Bottom discrimination display
The bottom discrimination display, which requires a bottom discrimination capable
transducer or Bottom Discrimination Sounder BBDS1 or Network Fish Finder DFF1-
UHD, identifies probable bottom composition. The display is available in all screen di-
visions, single or dual frequency mode, and occupies the bottom 1/6 of the screen in
the full screen display.
Use this feature with ship speed 10 knots or less and depths between 5 and 100 m.
Note 1: Composition estimate accuracy may be affected when the transducer is not
parallel with the seabed.
Note 2: When the bottom discrimination feature is active, picture advance speed may
be affected.
How to activate or deactivate the bottom discrimination display
1. Open the home screen, then tap [Settings] - [Sounder].
2. Tap [Fish Finder Source].
3. Tap [TZTL12F], [TZTL15F], [TZT2BB], [BBDS1] or [DFF1-UHD] as applicable.
4. Tap the close button to finish.
5. To activate or deactivate the bottom discrimination display, turn [Bottom] on or off
from the pop-up menu.
Bottom
discrimination
display
Rock
Gravel
Sand
Mud
Sand and rock are the most likely bottom type in this example.
ft
HF/LF
576
(
S
)
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