R2Sonic 2026, Operation Manual

Page: 143 / 254

Page 143 of 254
Version 6.3 Rev r012
Date 05-11-2022
Figure 166: Gyrocompass Calibration method 1
• Quayside Benchmarks have known geodetic positions.
• Measure Range and Bearing to reflectors on the vessel centre line.
• Using Range and Bearing to reflectors, determine a geodetic position for
reflectors.
• Calculate bearing from the stern reflector to bow reflector will give the true
heading of the vessel.
• The true heading of the vessel is then compared to gyrocompass reading
taken at the same time as the Range and Bearing measurements.
•
Benchmarks do not have to be on the quay but should be in a position to
give accurate Range and Bearing to the reflectors.