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Master Reference
•
Position
A location derived from measuring external reference points.
•
Depth
The vertical distance downwards from the water surface.
•
Heading
The direction in which a vessel is pointing, as opposed to the course made good.
•
Magnetic Variation
If you are using a magnetic heading sensor, enter the local magnetic variation into
the
Magnetic Variation
box to get true heading. This parameter can be changed
while the Sonar Head is running.
•
Pitch/Roll
Pitch is the up/down rotation of a vessel about its lateral axis. Roll is the tilting
rotation of a vessel about its longitudinal axis.
•
Heave
Heave is the linear vertical (up/down) motion of the vessel.
•
Sound Speed
This shows the current sound speed value, whether it is provided by a sensor,
calculated or entered manually. A sound speed sensor is required to accurately
measure in-water speed near the Sonar Head. This parameter can be changed while
the Sonar Head is running.
Check the
Override Sound Speed
box if you want to replace the sound speed value
in your recording with a fixed value during playback. This may be necessary, for
example, if your recorded sound speed is not accurate.
Note
You can override the sound speed in .mmb files only.
Related topics
System Configuration dialog box - Sensors Setup page, page 115
Summary of Contents for M3 Sonar
Page 1: ...Reference Manual M3 Sonar FLS Forward Looking Multibeam sonar ...
Page 2: ......
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