I have had 3 different makes of Autopilot over the last 10 years; Autohelm 7000, Cetrek, and now a Simrad badged Robertson (AP20). The Cetrek and the Simrad were on the same version of aft cabin trawler, but the former was 50 ft and the latter 54 ft. The Cetrek struggled in following or quartering seas, and I put this down specifically to the pilot. But after talking around I decided to install the Simrad on the new Sally Lillian, but with a rate compass instead of the standard unit. A transformation, straight as an arrow in up to 10- 12 ft quartering seas! So the question for you guys with the Robertson units that do not perform is; what compass do you have feeding it? Merry Christmas from the UK. Michael Slater Sally Lillian Falmouth UK _____________________________________________________________________ This e-mail has been scanned for viruses by the WorldCom Internet Managed Scanning Service - powered by MessageLabs. For further information visit http://www.worldcom.com