Sounder Display; Description Of Sounder Display - Furuno GP-7000F Operator's Manual

10. VIDEO SOUNDER OPERATION
10.1

Sounder Display

10.1.1

Description of sounder display

Color bar
Depth
Single frequency
50 kHz 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.
200 kHz picture
The higher the frequency of the ultrasonic pulse the better the resolution.
Therefore, the high frequency is ideal for detailed observation of fish school.
10-2
Minute marker
Temp
scale
50
40
30
120
ft
200k
Tx frequency
Indications on the single frequency display
Sounding area and transmission frequency
Depth scale
Time
0
0'30"
50.0
50
Fish
echo Time
marker
100
150
Bottom echo
50k frequency
200k frequency
Zero line
Depth to VRM
VRM
Water
temp
graph