Gyro-compass Speed Error.
Gyro-Compass Speed Error: an error of the gyro-compass; the gyroscope axis deviation from to the true north direction.
It depends on the vessel speed, the ship course and the latitude.
It is maximum in courses of 0 ° and 180 ° and null in courses of 90 ° and 270 °.
It can be removed automatically using a special corrector.
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