How To Measure The Time And Depth To Objects - Furuno SFD-1010 Operator's Manual

3. FISH FINDER
Key control:
1. Press the Popup menu key to open the [Popup] menu.
2. Select [Gain Auto] with the arrow keys, then press the ENTER key.
3. Select [Off] with the arrow keys, then press the ENTER key.
4. Select [Gain HF] or [Gain LF] with the arrow keys, then press the ENTER key.
5. Set the gain adjustment level with the arrow keys, then press the ENTER key.
6. Press the MENU/ESC key to close [MENU].
3.5

How to Measure the Time and Depth to Objects

The VRM (Variable Range Marker) measures the time and depth from own ship to an
object (a school of fish, bottom, etc.). You can display the marker by tapping the object
for which you want to take measurements.
3-10
VRM
Range and time to
VRM