Deviation, Variation and Heading Offset

[Derek - Raymarine - Moderator]

Hi Bob,

The issue is likely that the p70 will not calibrate the older generations of Autopilot. the p70 will control them AUTO, STANDBY etc . . . but you cannot access the compass cal on the earlier computers.

If you could borrow an ST6000/ St6001 or ST6002, connect via SeaTalk, then you could change the compass heading in the calibration by up to 180 degrees.

On another point, if the computer repeatedly 'forgets' the compass heading offset, then it sounds like the Eeprom in the computer is failing and the computer might need to be replaced as spares of the older computers are few and far between.
Regards

Derek