Slip
fees in most
marinas in the US are either based on the slip or the
boat. My last marina leased 30', 35', 40' or whatever slips. As long as your boat fit in the slip without anything hanging out into the fairway, you were good to go. That meant not using their
davits to store a
dinghy for a couple of boats. My nominally 35' boat got 'upgraded' to a 40' slip because it was 36' long when you measured from the bow roller to the stern.
Other
marinas rent by the foot of overall length. In almost all cases these days, the overall length is anything that sticks out front and back. My old Westsail 32 got measured as a 42' boat, IIRC, even though it was only 32' on
deck. Boomkin,
self steering, and
bowsprit increased the marinas
income off the boat. Not wanting to say the marina management are greedy, but they typically will add anything to the boats measurement to gain the maximum fee. Surprized that more boats with bowsprits haven't worked out a hinge arrangement to reduce the slip fees.
Mlutihulls have the added problem of width. Most go on end ties which are usually charged at a higher rate. Have seen some that take up two slips on a finger pier for twice the per foot
price, I'm sure. Got to be careful with those
training wheel boats
cause the Marinas love to hammer you.
Perhaps
Leopard has taken to measuring their boat diagonally to gain some additional
marketing clout.