Furuno GP-3700F, Operator'S Manual

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11. ECHO SOUNDER
11-13
11.6 How to Enter a Mark on the Display
You can mark the geographical location of a school of fish on the plotter display
through the echo sounder display by pressing a numeric key among
1 to 8 .
• Echo sounder display
When the cursor is turned on, a vertical line is entered at the time marker position
of the echo sounder display. On the plotter display, the selected mark or number is
entered at the position the moment the key is pressed. When the cursor is turned
off, a vertical line is entered at the right edge of the echo sounder display. On the
plotter display, the selected mark or number is entered at the own ship position the
moment the key is pressed. The color of this line depends on the number of display
colors used. It is the seventh color from the top of color bar in the 64-color display,
or the top color in the 16-color display.
• Plotter/echo sounder display
When the cursor is turned on, a vertical line is entered at the time marker position
of the echo sounder display. On the plotter display, the selected mark or number is
entered at the cursor position. When the cursor is turned off, a vertical line is entered
at the right edge of the echo sounder display. On the plotter display, the selected
mark or number is entered at the own ship position.
11.7 How to Reduce Interference
Interference from other fish finders and electrical equipment appear on the screen as
shown in the illustration below. When these types of interference appear on the
screen, use the interference rejector to reduce the interference.
1. Press the MENU key to open the main menu.
2. Select [9. ECHO SOUNDER SETTING].
3. Select [2. INT. REJ. SETTINGS].
4. Select the level of interference reduction, [NL1], [NL2], or [NL3]. [NL3] provides
the highest degree of interference reduction. [NONE] turns off the interference re-
duction.
5. Press the DISP key to close the menu.
Interference from
other sounder Interference from
electrical equipment