How To Measure Depth - Furuno FCV-600 Operator's Manual

1. OPERATION
1. Press the GAIN key to open the [Auto Gain] setting window.
2. Rotate the KNOB to select [Off]. The gain value (example: [G: 50]) appears on the
top of the display.
3. Press the KNOB.
4. When the dual frequency window is displayed, press the KNOB to specify the dis-
play to be adjusted.
Each press of the KNOB switches the highlighted display to indicate the selected
screen.
5. Rotate the KNOB to adjust the gain (0-100).
When adjusting, the gain value will be highlighted. When the gain is changed, it is
also reflected on the past image displayed on the screen.
1.8

How to Measure Depth

The VRM (Variable Range Marker) functions to measure the depth to schools of fish,
etc. This function is inoperative when a NAV data display is active.
Note: This operation cannot be used when Nav data window is displayed.
1. On the sounder screen, Use  or  to place the VRM on the object to measure
depth.
2. Read the VRM depth, which appears above the VRM.
1-14
Gain too high Gain proper
Depth to VRM
VRM
Gain too low