Flat deck, beak nose, wide point above center. The bottom has a double barrel concave tip to tail. It also has a channel running inside the fin one quarter of the way up from the tail and a short slot channel that runs from the back of the fins out the tail for hold. I put this in for the hold of a stabilizer center fin without the drag. Feedback has been so positive. It you are looking for a performance/growler twin that you don't have to hold back on and really push through your turns, this is it!