I wouldn't go with a hydraulic ram since you have a cable and quadrant system. Unless the boat is really heavy, I would go with a linear drive below deck autopilot. Hydraulics only really make sense on a really heavy boat with hydraulic steering IMHO. How much does the Chieftain displace??
thanks for the replies, The chieftain displaces approximatley 8 ton. I must admit I was taken with the guy from Simrad he really knew his product and did mention that they had taken over from Robinsons. I spoke with the Raymarine people today and arranged to take the boat to the local marina next week for a quote and work out how it could be fitted. Price is not really an issue, well it is but with an auto pilot I figure spending a few extra bucks for a good unit is a good investment in keeping us safe at sea.
Greg and Sue
Land down under