Furuno GP-3500F - Manual (Page 193)

11. VIDEO SOUNDER OPERATION
11-21
11.9 White Marker
The white marker functions to display a particular echo in white. For example,
you may want to display the bottom echo in white to discriminate fish echoes
near the bottom.
1. Press the [MENU] key to show the main menu.
2. Press the [9] key to show the ECHO SOUNDER SETUP menu.
3. Press the [4] key to show the WHITE MARKER window.
WHITE MARKER
OFF
White marker window
4. Rotate the [ENTER] knob to select color to display in white.
As you rotate the [ENTER] knob, the number (corresponds to echo number) in
the marker window changes, the white marker on the echo strength bar shifts
and selected echo color is displayed in white.
←
White marker shows
color currently
displayed in white.
Echo strength bar (16 color) when white marker function is active
5. Press the [ENTER] knob.
6. Press the [MENU] key several times to close the menu.
Note:
To turn the white marker function off, select OFF at step 4.