7. FISH FINDER (SOUNDER)
7-6
A-scope peak hold
You can show the peak-hold amplitude image on the A-scope display. With [A-Scope
Peak Hold] turned on, the image is slowly erased to help discern amplitude condition
more easily.
1. Open the Home screen, tap [Settings]→[Fish Finder]→turn on [A-Scope Peak
Hold].
2. Tap the close button on the title bar to finish.
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]→[Fish Sounder]→[Fish Finder
Source].
2. Tap [TZTL12F], [TZTL15F], [TZT2BB], [BBDS1] or [DFF1-UHD] as applicable.
3. Tap the close button on the title bar to finish.
4. On the Layers menu, then set [Bottom Discrimination] to [ON] or [OFF] as appro-
priate.
Bottom
discrimination
display
Rock
Gravel Sand
Mud
Sand and rock are the most likely bottom type in this example.
䝩䞊䝮
* Reliability of bottom discrimination display shown with a color.
- Green: Normal
- Yellow: Caution
- Background color: Abnormal
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