a ski boat
A planning hull is a hull of a boat that has its weight supported more by hydrodynamic lift, rather than hydrostatic lift or buoyancy.These boats are built for speed.
The hull on a boat is the body of it. It is watertight so that no water leaks in and sinks the boat.
Planning hull
On the hull
Displacement: The weight of the water the boat displaces. Hull weight: The weight of the hull of the boat
the hull helps keep the boat stable, if there was no hull, the boat would go in different directions
You may mean a planing hull. That is a shape of boat hull that "planes" or rides on the top of the water at high speed, rather than plowing its way through the water.
A hull is the watertight body of a ship or boat. Above the hull is the superstructure and/or deckhouse, where present. The line where the hull meets the water surface is called the waterline.
The hull of a boat is the main body that rides in the water. Engines, Decks, masts and rudders are all installed in or on the hull.
Basically, the hull on a boat keeps out the water, and displaces the water to create buoyancy, which enables the boat to float.
A single hull boat has only one hull, which is the standard for boats. Catamarans have two, or twin hulls.