*Sampling of output data
"The gyro-compass equipment shall provide an output, which is able to reach a minimum transfer rate of 10 readings per second, if a digital interface is used. (6.11.2 Gyrocompass for HSC)"
No standard exists for Magnetic compass.
2. Static error
Class A Gyrocompass (SOLAS/IMOA.424(XI). ISO 8728)
±0.75°× secant latitude
Class B Gyrocompass (widely used for the domestic ships and the fishing boats such as less than 500gt ships)
NSI: ±1.0°× secant latitude (The Netherlands's relaxation rules of gyrocompass for small ship)
Class A Magnetic compass (SOLAS/IMO A.382(X)、ISO 449)
±0.5°
Class B Magnetic compass (ISO 613 Class B)
±1.5°
3. Dynamic error
≪When a turn rate is less than 5°/sec.≫
Class A Gyrocompass
±1.0°× secant latitude
Class B Gyrocompass
NSI: ±1.25°× secant latitude (The Netherlands's relaxation rules of gyrocompass for small ship)
