When I was young I rode in a Chris Craft that was around 18' and had seating all around the sides, it would do about 40 and you had to sit down or you'd get thrown around, they are beautifully made and expensive. That boat belonged to a neighbors friend, that neighbor taught me how to fish for cutthroat trout with popgear and worms on a salt water bay and anytime I wanted to go fishing he let me use his Lapstrake dingy. When I'd first put the boat in the water it would leak like a sieve and after a few minutes the boards would swell up and the leaking would stop altogether, I always wish I had a boat like that. The Vikings built lapped boats and sailed the world with them. Around here Dories are called Rogue River boats, they draw very little water and even in the river flow are pretty easy to row to keep them in one place, river guides use them for steelhead and salmon and a lot of them are made out of aluminum, they used to be made out of plywood, with an extra layer of plywood on the bottom, a sacrifice layer for running over rocks, I think they do something like that for the aluminum boats as well.