this might help a little

a sled is a boat with a flat bottom and no v (angle) at the bow, or stern. they are kinda like a johnboat. sleds were the first boats used with jet engines. sleds usually did not have a good chine or a ceel. they slid around corners and took a little getting used too. sleds were replaced by shallow degree v boats. there are still a couple outfits making them. a sled would be good for rivers, but would give you a wet, rough ride in a small 2' swell, because the bottom beats the water.

most newer jet boats have a v shaped bottom. there are many different v angles which are known as degrees. the degree is usually flatter at the stern like 10 degrees and get steeper at the bow, or entry point, 22 degrees. the v shape causes the boat to spilt the water giving it a dryer smoother ride. this style of boat is what most people call a jetboat.

the driftboat is powered by oars, and is not really in the same class as the sled or v.

hope this helps.