SeaBat UI - User Manual
Operation
25
To achieve a correct beam
steering in equidistance
mode the sonar needs an
up-to-date online sound
velocity measurement.
The (horizontal) steering setting allows the operator to steer the swath
electronically.
The achievable steering depends on the selected coverage angle (see
below).
With the button Default
the steering and coverage angle will be
reset; the steering to 0.
The extent of the steering is determined by the coverage angle selected.
The limitation is that the outer beam cannot be steered past 5° from the
horizontal. When the swath is steered this way, the individual beam
widths increase with the steering angle. A beam steered at 60° is twice
the width of a beam steered at 0°.
Figure 4-18
With a swath of 120° the maximum steering is ±25° (85°-(120°/2))
Figure 4-19
With a swath of 60° the maximum steering is ±55° (85°-(60°/2))
4.3.3 Coverage Angle
The (coverage) angle allows the operator to change the swath width.
Figure 4-20
Coverage Angle
With the button Default
the coverage angle and horizontal
steering will be reset; the coverage angle to the maximum angle
depending on the selected beam mode.
60°
90°
85°
5°
25°
30°
90°
85°
5°
55°
