Errors of gyro compass are as follows:
- Static error
- Dynamic error.
- An error existing between the indicated heading and the vessel’s lubber line.
- An error existing between the indicated lubber line and the fore and aft line of the vessel.
- Both of these errors can be accurately eliminated by critically aligning the compass with the ship’s lubber line at installation.
An error existing between the indicated heading on the master compass and the heading produced by any remote repeater is a transmission error. Transmission errors are kept to a minimum by the use of multispeed pulse transmission.
Variable compass errors can effectively be classified into two groups.