A watercraft (1) comprising a hull (3), a deck (5) covering at least part of the hull, a member (7, 8) attached to at least part of the periphery of the deck or at least part of the topside of the watercraft, extending away from the hull, the member connecting to or forming a sponson (9, 10), and a means to deploy and retract the sponson. Preferably, the member is rotatably attached to the periphery of the deck, such that the means to deploy and retract the sponson comprises rotating the member between deployed and retracted positions.
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