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to be put to Manual (the TRG indicator colour will change to Yellow); simultaneously, the Ping
button will appear in the GUI. The only time an image will be updated is when the user selects the
Ping button.
Figure 73: Stealth mode single Ping button
5.6.9.3 Forward Looking Sonar (2026/2020)
The Sonic 2026 and Sonic 2020 both have steerable projectors (required for pitch stabilization),
which also provides the sonars with greater flexibility when used in FLS mode. In FLS mode, the
vertical beamwidth can be changed, and the transmit beam can also be vertically steered. The
degree of steering ability and width of the vertical beam is frequency dependent.
Because of these advanced features, with the Sonic 2026 and Sonic 2020 FLS mode, there is an
additional FLS option in the Settings menu that allows the user to set the Vertical Beamwidth and
the degree of Vertical Steering.
Figure 74: Settings menu FLS settings option
When FLS settings (or F3) is selected and one of the FLS options, in Mission Mode, is selected,
another window will be visible to select the beamwidth and steering angle.
Figure 75: Sonic 2020/2026 FLS Options
The lower the frequency, the wider the vertical beamwidth, and the greater the degree of vertical
steering allowed. V Beamwidth and V Steering are used to alter the beamwidth and steering angle
by using the left mouse button to decrease the value and the right mouse button to increase the
value, up to the limits set by the operating frequency.
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