Produced for circle racing and speed ski racing, the Shark was the first flat with strakes on the bottom. It is the prototype for all the later B-boats. Story goes that Julian Pettengill and Ron Ehde started out with a Aqua Craft Shark (with dropped chines and strakes). Made whatever changes they made, and the current Biesemeyer mold was built. Rusty Biesemeyer designed the deck and the rest is history.