• Down, Bathy Norm: Normal bathymetry survey
• Down, Bathy VFeature: With the ability to map vertical surfaces, without physically rotating
the sonar head, this Mission Mode provides improved detection methods tailored to
mapping vertical features. This specialised mode greatly reduces the corner ‘ringing’ seen in
older technology systems. When using Bathy VFeature, please use Equiangular bottom
sampling and not Equidistant.
• Down ,FLS Narrow/Wide: One Forward Looking Sonar mode. No bathymetry output; this
setting is for imagery only.
• Up, Bathy Norm; Up, Bathy VFeature: is the same as the above, but orientates the wedge
so it is pointing up (used primarily hull inspection type survey).
• Up, FLS Narrow/Wide: Most common setting when using the optional FLS feature
The Mission Mode can be changed on the fly, with no need to stop recording data.
5.5.8 IMAGERY
5.5.8.1 Acoustic Image (Display only)
The wedge can display acoustic intensity. This will aid in setting the correct combination of
operating parameters (such as power, pulse width and gain). Enabling the Acoustic Intensity will
increase the network load.
Enable the wedge Acoustic Intensity under the Display options. The Brightness control, in the main
window, is used to set the intensity in the display. A good brightness setting, to start with, is 30dB.
Most users also prefer the 1 pixel bathy dot option (on the Display tab), when viewing the Acoustic
Image, in the display.
Figure 49: Enable Acoustic Image in the wedge display
5.5.8.2 Forward Looking Sonar
Forward looking mode can be in one of two configurations. FLS Wide uses the 20° projector within
the standard projector. FLS Narrow uses the 1° standard projector. The wide mode, using the 20°
projector, will have a lower source level, but is very good for near field use. The narrow mode
allows for full source level to be used (221dB), but is more critical in aiming towards the target due
to the 1° transmit pattern.
Page 55 of 210
Version 5.0 Rev r002
Date 05-08-2014
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