Description Of Sounder Displays - Furuno NAVNET 1824C Operator's Manual

4. VIDEO SOUNDER OPERATION

4.1.2 Description of sounder displays

Single-frequency display
Zero line
Icons (alarm,
battery,
° F
simulation)
50
Color bar
40
Temp.
scale
30
Water
temp.
graph
Water
temp.
display
Depth
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
frequency is useful for general detection and judging bottom condition.
4-2
Variable Range Marker
(White)
Minute marker
S I
M
120
LF
Tx frequency
Indications on the single frequency display
Depth scale
Time
0'30" 0
SOUNDER
SINGLE
50.0
SHIFT
50
Fish
AUTO/
Cross-hair
echo
D.BOX
cursor
100
FREQ
LF/HF
150 DISPLY
MODE
200
Bottom echo
LF
Dual-frequency display
Display mode
SOUNDER DUAL
SOUNDER SINGLE
SOUNDER M. ZOOM
SOUNDER B. ZOOM
SOUNDER B/L
SOUNDER B/D
Soft keys
0.0
HF