Bottom Discrimination Display - Furuno NAVnet TZtouch2 Operator's Manual

7. FISH FINDER (SOUNDER)
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.
Bottom
discrimination
display
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.
7-6
ft
( S )
576
HF/LF
Rock
Sand and rock are the most likely bottom type in this example.
Gravel Sand Mud