Kongsberg Seapath 320, Installation Manual, Page: 48 / 152

Seapath 320
32 M300-62/rev.2
Pitch
Roll
Pitch and Roll mounting angles should ideally be confirmed against MRU logs, for
instance during Gyro calibration.
3.3.3 GNSS antennas
The following is to be surveyed:
Position (X,Y,Z), centre of the antenna #1 disc (or otherwise defined sensor point).
Angular offset between the line from centre antenna #1 to centre antenna #2 and the
vessel centre line (CL).
Note
This offset should be confirmed against a Seapath GPS heading log,
typically during gyro calibration.
3.3.4 Gyro
If a gyro compass is interfaces to the Seapath system, the following is to be surveyed:
The offset between the gyro compass heading and the vessel centre line (CL).
Note
The heading offset to be surveyed to an accuracy better than 1°.
Static gyro calibration/verification (heading log) and DGNSS health check should be
done after all DGNSS and gyro systems are installed and fully operational. This can be
performed in dock or alongside.
Dynamic gyro calibration/verification and attitude control (heading, roll, pitch control)
must be performed at sea.
3.3.5 Survey accuracy
The Seapath 320 product must be surveyed to the following accuracy level. If not, the
performance of the product will be degraded.
Lever arm vector from CRP to GNSS antenna position (X, Y, Z): < 0.1 metre.
Lever arm vector from CRP to MRU (X, Y, Z): < 0.1 metre.
MRU 5 misalignment angles (Roll, Pitch, Yaw) with the vessel axes: < 0.1°.