When you look at the hull in plan and profile the hull will present a wedge shape in both. For example, in profile the hulls of most East Canadian types will have a deep forefoot and a long curved run to the stern where it will be of not great depth. In plan view, most, if not all, are Swede form so they will be wider aft of the mid point of the hull. So either way it is viewed it will present a wedge shape. There seems to be a lot of discussion about this new fangled concept over at the Bateau board.
Hard chined soft chine matters not. Jacques has designed a beautiful little lobster boat, for which just had to have the plans, that is a double wedge hull type with a rounded and hard chine cross section depending on which station you are looking at. The praises for this hull are low power requirements (arm power ) and they are extremely sea worthy and efficient.
Try this link here.
http://www.kayakers.nf.ca/sea_kayaking/ ... hotos.html
Pay particular attention to the first and last photos in the last 5 photos. They demonstrate the hull shapes pretty well except for a plan view but I'm sure everyone is familiar with swede form.
A few more links.
http://www.kayakers.nf.ca/sea_kayaking/ ... hotos.html
http://www.canadiana.org/ECO/ItemRecord ... e1966edcb7
The last one is very informative but the whole site is a goldmine for someone wanting to research Inuit kayak design.
From my personal experience I can tell you that this type of boat is very fast and efficient and the one I currently am paddling is 22' and can turn completly within it's own length. The deep forefoot acting as a skeg combined with the generally flat bottom. It also allows one to make progress into a headwind by holding the bow on course.
Stablity, well, you would almost have to experience it to beleive it. Just don't let it end up on top of you because they are even more stabil upside down.