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Confused about overhangs...
One additional consideration regarding boat motion and overhangs is how they effect the boat''s motion at anchor. A cruising boat spends a lot of time anchored. Even a cruiser/racer is likely to spend a lot of time anchored. In any kind of chop, the flat sterned "sugar scoop transom" is an abomination to those who intend to sleep onboard. I''ve had this experience with friends'' Catalina 320 and Beneteau 36. It''s like being in Shamu''s belly during an all night belly-flop contest. Sometimes, you can here the stern slap from another of these boats from a couple hundred yards away. An example of a boat that behaves nicely at anchor as another friend''s 80''s Ericson 32. The boat has moderate overhangs, is usually considered to be initially tender, but when anchored with the nose into the chop, it acts like an elevator car. There was minimal, soft rolling, very litle pithching, and no bone-jarring slaps.
Another observation not directly related to boat motion is reserve buoyancy, especially at the bow. Many of the go fast boats today have fine entries and plumb bows which are fast and good for the boat''s motion, as has been mentioned. But they are also largely wave piercing. It''s a staple of sailing magazine covers to show a fast boat head-on, the bowman getting ready for the windward mark, just as the boat punches through a wave, which is now blasted up and over the foredeck crew. Not just spray, but practically the entire wave!
There are trade-offs, and deciding which is appropriate for your needs is why you should, as has already been mentioned, sail lots of boats. And anchor them, too.