The underwater contour of a boat refers to the shape and design of the hull below the waterline. This contour affects the boat's performance in terms of speed, stability, and efficiency in the water. Different hull designs, such as flat-bottomed, V-shaped, or round-bottomed, have varying impacts on how a boat moves through the water.
A flat boat is a flat-bottomed boat used to float goods and passengers downriver.
Sunfish
They can be a barge or a narrow boat.
ferryboat
Flatboat
A gondola.
A batteau is a small, flat-bottomed boat.
A bateau is a small, flat-bottomed boat.
A sampan is a relatively flat-bottomed Chinese wooden boat.
barge
Pirogue boats are a small, flat-bottomed boat.