Furuno CH-270 - Manual (Page 79)

4. ECHO SOUNDER MODE
4-7
4.9 Range Marker
The range marker functions to measure the range to a target echo (fish school, bottom,
etc.)
1. Operate the Omnipad to place the cursor on the location desired.
2. Press the [R/B] key to display the range marker. The range marker appears along with
range indication.
3. To erase the range marker, place the cursor on the marker or outside the display area
and then press the [R/B] key.
Range
NAV
DATA
or
A-SCOPE
DISPLAY
Depth, Water Temp. Display
67
Range marker
Range marker