The diagram at the lower right side of the dialog box shows the sign convention that should be used.
The user is allowed to accept the offsets that may already be stored in .XTF file, or enter different offsets.
IMPORTANT NOTE: In order for any information entered this dialog to be used in the processing of the mutibeam dat a .GEO file must be saved using the "Save As" button, you may also:
1, Open and edit and existing .GEO file.
2. View the offsets stored in the loaded .XTF file.
When checked this causes BathyPro to read and use the offsets from the XTF file, you may also add corrections (for Example a Roll offset) and save a .GEO file.
When checked this causes BathyPro to Add the value from the ROV or Towfish depth sensor to the computed water depth to give the total water depth.
Add Layback from XTF file - Apply the layback stored in the XTF file to the computed position.
Add Fixed Layback - Applies a user-entered value of layback to the computed position.
Add Depth from XTF file - Add the depth in the XTF file (from the towfish pressure sensor) to give total water depth.
Roll (*) - the angular offset in degrees (+ or -) between the multibeam sonar transducer and the Motion Sensor in the Roll Axis.
Pitch (*) - the angular offset in degrees (+ or 1) between the multibeam sonar transducer and the Motion Sensor in the Pitch Axis.
Yaw(*) - the angular offset in degrees (+ or 1) between the multibeam sonar transducer and the Motion Sensor in the Yaw (heading) Axis.
Heading offset (*) - a gross installation offset (for example 180deg in the case of a reverse mounted head)
Multipliers - allow the entry of a multiplier. (for example when deriving heave from POSpac processing you would set the heave multiplier here to zero)
Latency Offsets (mS) - offsets in time for each sensor derived from the Patch Test.
The following diagram shows some typical values and how they would be entered into the Vessel Geometry dialog.