After a lot of research
and agonising, I recently purchased a CPT autopilot
and installed it. Unfortunately it would not work on my boat (when I set the heading and the boat wandered, the CPT corrected in the direction it wandered and continued correctiing in that direction until we had done a full circle). The CPT people could find no problem with their equipment
and decided it was because there was too much magnetic interference
on my boat. They refunded me the purchase price
(but not the $250 total I paid in freight). However I am unable to demonstrate significant magnetic interference
. The original Simrad autopilot
that was installed when I bought the boat worked in reasonable conditions. Has anyone had any experience?
My dilemma now is what to install, having decided that the only real option for me was he CPT unit. Working conditions below the cockpit
are very cramped and difficult for installing and maintaining a below decks unit, not to mention the cost. I suspect that my boat must displace 7.5 tons (design displacement
is 6.25 tons) which is the upper limit for recommended for the Raymarine
pilots, so I would not expect them to handle the boat in other than calm conditions.