My jet craft runs very well in shallow water but seems sluggish in the deep stretches of water, why?
There a simple answer, it is just a bit wordy. There are basically two types of hulls, Displacement Hulls and Planing Hulls. Displacement hulls are designed for big water applications. They cut through the water with an extreme degree of angle in the bow, pushing the water to port and starboard. In rough seas, the idea is not to plane, but to push through the water. Planing hulls are designed to lift and ride on the surface of the water. To do this, they need ample power and enough semi-flat surface area to actually skim on the surface of the water. In shallow water, a high level of pressure is produced on the bottom of the boat. The result is a lift in the hull as the water attempts to escape from underneath the bottom of the boat. Even at modest speeds in the low to mid 20s, the hull actually skims or hydroplanes on top of the water much like your car tires do on water covered roadways. As with a car tire there is a point where the level of surface pressure decreases, such as deep pu
