| 摘要 |
A floating vessel having tanks adjacent both sides and both fore and aft of the vessel, the tanks extending vertically above and below the waterline. Each tank has a series of vertically spaced openings to the outboard side of the vessel, the openings being both above and below the waterline. The size of the openings is adjustable to control the rate at which water fills and empties the level of the water relative to the sides of the vessel rises and falls. |
