Regarding the canoe stern, I have already metioned that it should be excluded. However, the design of the hull under that is what I am talking about. It is very rounded or pointed. It sticks out abover the water.
Another example would be a Mason. Sorry, I have no pics of them rafted up with me since none of them want to!!!! Some people have no class!! At any rate, the design under stern and the hull exposed while pitched is minimal. It allows for a rolling (or even breaking) sea to split around the boat with less force than the other.
Here is a pic:
