groundhulls

Groundhulls are a type of hull design used in various watercraft, including boats and ships. They are characterized by their flat, horizontal bottom surface, which is designed to provide stability and reduce drag. This design is particularly effective in shallow waters, where the flat bottom allows the vessel to sit closer to the seabed, minimizing the risk of grounding.

The term "groundhull" is often used interchangeably with "flat-bottom hull" or "planning hull." Groundhulls are commonly found in small craft such as dinghies, runabouts, and motorboats. They are also used in larger vessels, including some types of ferries and cargo ships, where stability and shallow draft are crucial.

One of the primary advantages of groundhulls is their ability to "plane," or ride on a cushion of water, which significantly reduces drag and allows for higher speeds. This is achieved by the hull's design, which creates a wedge-shaped cross-section that pushes water out of the way as the vessel moves forward.

However, groundhulls also have some disadvantages. Their flat bottom can make them more susceptible to damage from rocks, debris, or other underwater obstacles. Additionally, their design can make them less maneuverable in tight spaces or when navigating through narrow channels.

In summary, groundhulls are a versatile and efficient hull design, particularly well-suited for shallow waters and high-speed applications. Their flat bottom provides stability and reduces drag, while their wedge-shaped cross-section allows them to plane on the water. However, their design also has some limitations, particularly in terms of maneuverability and susceptibility to damage.