The last posting is right on the money, If you look at the hull shape in the right light you will see a vee from about 4" up from the bow to just past the front beam, The prototype was worse being the vee was 2" up the bow to the front beam, when you get the bow under the water to the vee it will hunt for the bottom, it is especially prone to happen in very gusty conditions, where you have little time to react, once you get the hulls up on a "plane"? it dosen't happen unless you hit a wrong wave. One day we were training in strong 25 gustting 30 knots on the pototype and it was almost impossible to get it going