Join Date: Oct 2000
Location: Portland, OR
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For most small pocket cruisers, the "weight" and the Displacement will be pretty much the same, for your purposes.
That given weight sounds a tad heavy for an 18 footer, BTW.
(I recall from somewhere in the depths of old memories that a SJ-21 weights about 1250 and a Ranger 20 weighs 1550#.)