Furuno CH-300 - Manual (Page 34)

2. HORIZONTAL MODE
2-8
2.6.3 Suitable tilt angle
The figure below illustrates the relationship among tilt angle (0, 5, 10 and 15 degrees),
depth and detection range. Refer to it to find out the suitable tilt angle for a given
depth/detection range.
100
(200)
200
(400)
300
(600)
400
(800)
Range (m)
0
°
5
°
10
°
15
°
20(40)
40(80)
60(120)
80(160)
100(200)
200(400)
Vertical width of sonar beam
10
°
17 m
100 m 100 m
300 m
51 m
200 m
Depth (m)
34 m
Tilt angle and beam coverage (frequency 85 kHz, vertical beamwidth 10 °
at -3 dB )
Tilt angle and beam coverage
Frequency and detection range
Frequency Vertical beam width 100 m 200 m 300 m
85 kHz 10° -3 dB 17 m 34 m 51 m
60 kHz 14° -3 dB 24 m 48 m 72 m
153 kHz 5° -3 dB 9 m 18 m 27 m
215 kHz 4° -3 dB 7 m 14 m 21 m