Air cavity vessel

摘要

An air cavity vessel (100) which forms an air cavity over the bottom (101) thereof to reduce frictional resistance to water includes: a plurality of longitudinal compartment members (110) attached to both sides of the bottom to partition the bottom in a longitudinal direction and projected from the bottom of the air cavity vessel; a plurality of transverse compartment members (120) extending in a widthwise direction on the bottom to form space areas (S) for the air cavity through cooperating with the longitudinal compartment members (110); and an air supply unit (130) supplying air to the space areas to form the air cavity. Each of the transverse compartment members (120) is moved between a retreat position where the transverse compartment member is retreated at the same level as the bottom surface and a projection position where the transverse compartment member is projected from the bottom surface.