Furuno GP-1850DF Measuring Depth, Selecting display range, Adjusting the gain, Range shifting

Selecting display range

Press the soft key RANGE to show the range window, and select range by the cursor. Press the soft key RETURN to finish.

RANGE

▲

'15 ft

™30 ft

™60 ft

™120 ft

™200 ft

™400 ft

™1000 ft

™4000 ft

▼

Figure 2-15 Range window

Adjusting the gain

Press the soft key GAIN to show the gain window, and press ▲ or ▼ to set the gain. Current level is shown above the bar. Press the RETURN key to finish.

GAIN

▲57

HIGH

LOW

▼

Figure 2-16 Gain window

Note: On the dual-frequency display, the gain can be independently set for 50 kHz and 200 kHz. This can be done with the soft keys GAIN 50kHz and GAIN 200kHz.

Normally, set the gain to the point where ex- cessive noise does not appear on screen. Use a higher gain setting for greater depths and a lower setting for shallow waters.

Range shifting

The basic range may be shifted up or down as desired.

Press the soft key SHIFT, and press ▲ or ▼ to shift the basic range. Press the soft key RETURN to finish.

Shift

Display

Figure 2-18 Shift concept

2.7Measuring Depth

The VRM functions to measure the depth to fish schools, etc., and it is always displayed.

1.Press ▲ or ▼ to shift the VRM.

2.Depth is shown just above the VRM.

VRM (white) Depth to VRM

34°	12.345' N	CSE	245.8°	SOUNDER
135° 12.345' E		SPD	16.3kt
			15.0	RANGE
30			20
				GAIN
20			30
				SHIFT
10			40
				MODE/
0			50	FREQ
54.0
				SNDR
DGPS 3D
	50k			FUNC

Figure 2-19 How to use the VRM

Gain too high Gain proper Gain too low

Figure 2-17 Examples of proper

and improper gain

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