Sounder Display Description - Furuno GP-1850F Operator's Manual

2.2 Sounder Display
Description
The figure below shows all indications and
markers which may appear on the normal
sounder display.
Normal sounder display
indications, markers
Variable
Range
Marker
Nav information
(white)
window
34 12.345' N
135 12.345' E
Color
30
bar
Temp.
20
scale
Water
10
temp.
Graph
0
54.0
Water
DGPS 3D 50k
temp.
display
Tx frequency
GPS status
Figure 2-2 Indications on
the normal sounder display
Note: The water temperature graph can be
set on or off (See page 11-4.). The tempera-
ture scale is fixed between 20-80 F (0 to
30 C).
The normal sounder display shows either the
50 kHz picture or 200 kHz picture. To switch
between these pictures, do the following:
1. Press the [SNDR] key several times to
show the normal sounder display.
DGPS 3D
50k
Figure 2-3 Normal sounder display
2-2
Functions for
soft keys
Depth scale
CSE 245.8
SOUNDER
16.3kt
SPD
RANGE
15.0
20
GAIN
30
SHIFT
40
MODE/
FREQ
50
SNDR
FUNC
Depth
0
SOUNDER
0.0
RANGE
50
GAIN
PLOT SHIFT
100
MODE/
SNDR
FREQ
SNDR
150
FUNC
2. Press the soft key MODE/FREQ. The dis-
play changes as below.
MODE/FREQ
AUTO CRUISING
'
™
AUTO FISHING
™
MANUAL
DGPS 3D
50k
Figure 2-4 Mode/freq window
3. Press the soft key SELECT 200kHz (SE-
LECT 50kHz).
4. Press the soft key RETURN to manually
close the window, or wait 10 seconds and
the window automatically closes.
50 kHz picture
The sounder uses ultrasonic pulses to de-
tect bottom conditions. The lower the fre-
quency of the pulse, the wider the detection
area. Therefore, the 50 kHz frequency is use-
ful for general detection and judging bottom
condition.
200 kHz picture
The higher the frequency of the ultrasonic
pulse the better the resolution. Therefore, the
200 kHz frequency is ideal for detailed ob-
servation of fish school.
Figure 2-5 Comparisons of
transducer frequencies
0
SOUNDER
0.0
SELECT
50kHz
50
SELECT
200kHz
100
150 RETURN
50 kHz
200 kHz