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Dimensions: Length: 28ft 6ins ( 8.69m) Beam: 10ft ( 3.05m) Something like a 35 foot twin engine heavily built cruiser will weigh in at about 9 ton when new. If your boat has one engine then at 29 feet it could weigh in at a guess of not more than 6 ton.
That's very helpful thanks. I have a single 35hp Nanni on shaft and the yard has a 5 ton limit so I may just be over that. Since posting I found this site https://boatdesignlab.com/?page_id=270 which shows about 5 tons for my boat.
I used to have an Aston Seamaster 30, which I had craned out to clear the prop. Using the alarm on the jib, the crane operator reckoned the weight was approximately 4.5 tonnes. I wouldn't have thought your boat would be heavier than 5 tonnes.
Well that's interesting Steve, some time ago Sutton Staithe Boatyard pulled our Seamaster 30 with their lift and tractor for a new cutlass bearing and re-antifoul. It came out OK but when getting it back into the water it damn near launched the tractor as well, they estimated the weight to be around 7 tons.