AB- V-MA-00650
01 February 2021
JF/RR
13
LD900 and INS
Commissioning Guide
Rotational Offset Adjustment
This section will illustrate how the measured rotational alignment offsets (precise offsets) should be adjusted to
the default course offset. The following illustrates the adjustments methods for both supported IMU models.
IMU-ISA-100C
When the X
axis of the IMU is offset to starboard by angle “a”. The Installation Rotation Z +90 value is reduced
by the measured angle:
When the Y axis of the IMU is offset down to the starboard b
y angle “a”. The Installation Rotation X +180 value
is reduced by the measured angle:
When the Z axis of the IMU is offset up to the bow
by angle “a”. The Installation Rotation Y 0 value is reduced
by the measured angle:
INS Rotational Offsets
– Side View (into Starboard Side)
INS Rotational Offsets
– Vessel Plan View
INS Rotational Offsets
– Forward View (from vessel Aft)
