Measuring Depth - Furuno GP-1850F Operator's Manual

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
'
™
™
™ 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
Current level is shown above the bar. Press
the RETURN key to finish.
GAIN
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.
Gain too high Gain proper
Figure 2-17 Examples of proper
and improper gain
2-6
15 ft
30 ft
60 ft
or to set the gain.
57
Gain too low
Range shifting
The basic range may be shifted up or down
as desired.
Press the soft key SHIFT, and press
to shift the basic range. Press the soft key
RETURN to finish.
Shift
Figure 2-18 Shift concept

2.7 Measuring 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)
34 12.345' N
135 12.345' E
30
20
10
0
54.0
DGPS 3D 50k
Figure 2-19 How to use the VRM
or
Display
Depth to VRM
CSE 245.8
SOUNDER
16.3kt
SPD
RANGE
15.0
20
GAIN
30
SHIFT
40
MODE/
FREQ
50
SNDR
FUNC