Suitable Tilt Angle; Finding Range And Bearing To A Target - Furuno FSV-30 Operator's Manual

2.4.5

Suitable tilt angle

The figure below illustrates the relationship among tilt angle, depth and detection
range. Refer to it to find out the suitable tilt angle for a given depth/detection
range.
Tilt angle and beam coverage (vertical beamwidth 18
20(40)
40(80)
60(120)
80(160)
100(200)
200(400)
Vertical width of sonar beam
18
2.5

Finding Range and Bearing to a Target

Operate the trackball to place the trackball mark on the target you want to
measure the range and bearing. The range, bearing and depth to the target
appear at the upper left corner of the screen.
100 200
(200) (400)
200 m
100 m 100 m
31 m
62 m
Tilt angle and beam coverage
TRACKBALL DATA
Slant range
Horizontal range
Depth
B Relative or
True bearing*
*True bearing requires
appropriate sensor.
Location of trackball data
)
at -6dB
300
(600)
300 m
93 m
B
Trackball mark
34 ° 56.789N
Trackball mark
123 ° 45.678E
position
2. HORIZONTAL MODE
Range(m)
400
(800)
˚
Tilt 0
(0˚-9˚)
˚
Tilt 5
(0˚-14˚)
˚
Tilt 15
(6˚-24˚)
˚
Grey: Tilt 10
(1˚-19˚)
(-6dB)
2-11