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7. FISH FINDER OPERATIONS
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• The 600 W transducers and triducers that support the bottom discrimination feature
are 520-5PSD, 520-5MSD, 525-5PWD, 525STID-MSD, 525STID-PWD.
• The 1 kW transducers that support the bottom discrimination feature are 50/200-1T
and 50/200-12M.
• The high and low frequencies are alternately transmitted, regardless of current dis-
play selection. The TX interval is slower when this feature is active.
• Operating environment:
- Depth: 16 to 328 ft
- Speed: 10 knots or less
• The bottom discrimination feature uses the distance from your boat’s draft. Be sure
to enter your boat’s draft.
How to set the bottom discrimination display
1. Open the [FISH FINDER] menu and select [BOTTOM].
2. Select [BOTTOM DISCRIMINATION].
3. Select [Graphic], [Probability] or [Off].
[Graphic]: Show the most probable bottom composition in four colors or graph
form.
[Probability]: Show the most probable bottom composition in graph form.
[Off]: Turn off the bottom discrimination display.
4. Select [LEGEND].
5. Select [On] or [Off] to show or hide the hardness legend (at the bottom of the bot-
tom discrimination display).
6. Press the ESC/MENU key to close the menu.
Probability legend
Graphic legend