Furuno GP-1850DF - Manual (Page 12)

1-6
Observing the picture
1. Press the [POWER] key to turn on the display unit.
2. Press the [SNDR] key to select the sounder display.
3. Press the soft key labeled "MODE/FREQ" to display the following message.
MODE/FREQ
▲
AUTO CRUISING
AUTO FISHING
MANUAL
▼
Figure 1-8 MODE FREQ selection screen
4. Select "MANUAL" by the arrow key.
5. Press the soft key labeled "RETURN".
6. Press the soft key labeled "GAIN" to display the following message.
GAIN
▲
HIGH
LOW
▼
50
Figure 1-9 GAIN adjustment screen
7. Confirm that Gain is set at 50 (midpoint).
8. Press the soft key labeled "RETURN".
9. Press the soft key labeled "RANGE".
10.Select "15ft" by the [ ▲ ] key.
11. Note the depth to the seabed.