| 摘要 |
A circular watercraft has a buoyant, generally toroidal hull supporting a rigid deck with an outer periphery in substantial conformance with the perimeter of the hull. The deck has an opening located above the central opening of the hull to permit placement of power means to drive and steer the watercraft. The hull can be an inflated structure such as an inner tube. A stabilizer assembly connected to the hull and deck lends horizontal and vertical stability to the craft. Reserve floatation can be provided by an auxiliary torodial pontoon nested within the central opening of the hull but normally located above the water line.
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