Furuno NAVNET 1752C - Manual (Page 161)

4. VIDEO SOUNDER OPERATION
4-15
4.9 White Marker (MODEL1722C/1723C series)
The white marker functions to display a particular echo color 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.
2. Press the SOUNDER MENU soft key.
3. Select WHITE MARKER, and press the EDIT soft key to open the white
marker window.
WHITE MARKER
▲
OFF
▼
White marker window
4. Use the cursor pad to select color to display in white. As you use the cursor
pad, 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 RETURN soft key followed by the [MENU] key to close the menu.
To turn the white marker function off, display “OFF” in the white marker window.