Kongsberg Seapath 320, Installation Manual, Page: 64 / 152

Seapath 320
48 M300-62/rev.2
9 Inspect the logged calibration data (in the file "Seapath.cal") for any wild points
by selecting the command
Show graph . Correct the wild points found or delete
the whole line(s) and perform a recalculation of the calibration data.
10 When the Seapath calibration result has been found acceptable, click Next to
proceed to page 4. Input the mean value for the vessel heading reference, in this
example logged on a separate PC and found to be 160.00 degrees, and click on
Compute in order to calculate the heading offset.
Figure 20 Page 4 of antenna calibration wizard
11 Click Finish to accept the result and exit the antenna calibration wizard.
3.4.4.3 Calibration of MRU axis
After the mechanical installation is completed, the MRU R, P and Y axes must be
aligned to the corresponding vessel axes or the axes of the system to be compensated.
To achieve the MRU's specified roll and pitch accuracy, any misalignment of the MRU
axes with the vessel axes must be precisely calculated and accounted for. The MRU
axes, and particularly the yaw axis, must be aligned with the vessel axes with an
accuracy better than 0.5 degrees to ensure that the MRU functions are according to
specifications. For multibeam echo sounder applications an accuracy better than 0.1
degrees is required to ensure satisfactory performance.