80TYPE 100/300 Operation and Installation Handbook3.10 GyroPlus Offset and Drift CompensationThe GyroPlus uses the latest generation solid-state rate gyro to enhancesteering performance at response level 3 (see Calibration for details). Likeall rate gyro's the GyroPlus is subject to offset and drift. However, this isautomatically compensated for whenever the autopilot is in AUTO mode.When the GyroPlus is initially installed, it is important that offset and driftcompensation ( a once-only operation) is carried out before selectingresponse level 3 - failure to carry out this procedure will result in rapidcourse changes when level 3 is selected.ProcedureCompensation for offset and drift is achieved by simply using the autopilotin response level 1 or 2 for at least 5 minutes before you select level 3.Alternatively, if you want to use response level 3 as soon as you engageAUTO, then the following procedure must be carried out.1. Moor the vessel so that the heading remains constant.2. Press AUTO and leave for at least 5 minutes.3. After 5 minutes, press STANDBY to return to "standby" mode. Theautopilot will nor have stored the compensation value for future use.
