Description Of Sounder Displays - Furuno NAVNET 1734C Operator's Manual

4. VIDEO SOUNDER OPERATION

4.1.2 Description of sounder displays

Single-frequency display
Zero line
Icons
(alarm, battery,
simulation)
Color bar
Water
temp.
display
Note: The water temperature display requires an appropriate water temperature sensor. It
can be turned on or off with TEMPERATURE GRAPH on the SOUNDER MENU.
Selecting transmission frequency
The single frequency display shows either the LF (low frequency) picture or HF (high
frequency) picture. To select transmission frequency, press the FREQ LF/HF soft key. "LF"
or "HF" is highlighted on its key label with each press of the key.
Dual-frequency display
The dual-frequency display provides both
LF and HF pictures. This display is useful
for comparing the same picture with two
different sounding frequencies.
LF picture
The sounder uses ultrasonic pulses to
detect bottom conditions. The lower the
frequency of the pulse, the wider the
detection area. Therefore, the low
4-2
Variable Range Marker (white)
Minute marker
S
I
M
F
50
Fish
40
echo
Temp.
scale
30
(orange)
Water
temp.
graph
114
LF
Tx frequency
Depth
Indications on the single frequency display
Display mode
Depth scale
Time
0
0'30"
SOUNDER
SINGLE
SHIFT
52
50
AUTO/
D. BOX
Cross-hair
cursor
FREQ
LF /HF
100
DISPLY
MODE
150
200
Bottom echo
LF
Dual-frequency display
Soft keys
0.0
HF