Suitable Tilt Angle; How To Measure Range And Bearing To A Target - Furuno FSV-25 Operator's Manual

2. HORIZONTAL MODE
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 setting: relationship between tilt angle and detection range
20(40)
40(80)
60(120)
80(160)
100(200)
Depth (m)
200(400)
Vertical width of sonar beam
100 m
10°
17 m 17 m
Vertical beam 10°
2.5

How to Measure Range and Bearing to a Target

Operate the trackball to place the cursor 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.
Note 1: Trackball position may also be shown in latitude and longitude. For further de-
tails, see page 6-12.
Note 2: The bearing display is available in four formats. See page 6-12.
2-8
100 200
(200) (400)
300 m
200 m
35 m 35 m 52 m 52 m
TRACKBALL DATA
Slant range
Horizontal range
Depth
B Relative or
True bearing
Cursor L/L position
300
(600)
100 m
11°
19 m 19 m
Vertical beam 11°
Cursor
B
Heading line
Own ship mark
34°56.789N
123°45.678E
Range(m)
400
(800)
°
Tilt 0
(0°-5°)
°
Tilt 5
(0°-10.5°)
°
Tilt 15
(4.5°-15.5°)
In grey
°
Tilt 15
(9.5°-20.5°)
300 m
200 m
58 m 58 m
39 m 39 m