| (57) Described herein is a multipurpose watercraft comprising: at least one pair of hulls
                     consisting of boards, for windsurfing (1, 2) or kitesurfing (24, 25), or else of inflatable
                     pneumatic tubes (40); and a topside (3; 3a), which interconnects the two hulls and
                     is configured for selective application of a mast-sail-boom rig (16, 17, 18) for windsurfing,
                     or of an outboard motor (21) and corresponding steering unit (19, 20, 23), or of a
                     seat (28) for a rower or for a person handling a kite, as well as of a possible tent
                     (22) for nautical camping. 
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