Abstract: Retractable hulled catamaran boat comprising: Central body also port and starboard hulls. Said body having port and starboard walls with entry openings; also floor with underside having hull span stop means and being smooth and/or having track or channel system for said hulls retractable mounting. Said hulls with upright means having inboard sides with mounting means for roller (slider) mounting on said floor underside enabling hull retraction under said body or extension and having outboard sides attaching an associated hull roof. First embodiment said roof being minimum two fastened panels. Second and third embodiments said roof being three dimensional enclosure. First and second embodiments said roof free top/inboard edge attaching associated said walls. Third embodiment said roof inboard edges angled forming outward span stop and each said roof travels through opening in associated said walls. Said roof folds, detaches, or retracts allowing hull retraction.

Abstract: A catamaran central body portion with floor having front and mid walls also port and starboard side walls and smooth underside having flange lips in alignment with said side walls forming mating surfaces for attaching two roof sheltered hulls whereby said hulls attach to said lips likewise roofs attach to said side walls forming a disassemble catamaran boat. Roofed alcove enclosed by said front, mid, and side walls. First and second embodiments having bridge area with navigation controls rearward of said alcove and further rearward a passenger area. Third embodiment having passenger area roofed cabin rearward of said alcove and further rearward a bridge area with navigation controls. Hull entry openings in both said side walls are in passenger area of first and third embodiments and in bridge area of second embodiment. Rear portion of said side walls having wall bracing structures for strengthening.

Abstract: A catamaran boat that can be sailed or motor driven having a central cabin structure carried above water by a pair or more of retractable hulls whether hulls are extended or retracted. Each hull outboard side has an upward extending hull wall hinged close to the edge of roof on two opposing sides of cabin structure so as to allow hulls to swing retract under the cabin structure, swinging from these hinges attached close to the roof. Each hulls inboard side has retraction guiding means for rolling or sliding on tracks which are attached to cabin structure's underside and end wise attached to a outer surrounding frame. A pair of dual threaded shafts with opposite threaded brackets attached to inboard side forward and rearward end of each hull functions to spread hulls apart or return closer together.

Abstract: A catamaran boat that can be sailed or motor driven having a central cabin structure carried above water by a pair or more of retractable hulls whether hulls are extended or retracted. Each hull outboard side has a upward extending hull wall hinged close to the edge of roof on two opposing sides of cabin structure so as to allow hulls to swing retract under the cabin structure, swinging from these hinges attached close to the roof. Each hulls inboard side has retraction guiding means for rolling or sliding on tracks which are attached to cabin structure's underside and end wise attached to a outer surrounding frame. A pair of dual threaded shafts with opposite threaded brackets attached to inboard side forward and rearward end of each hull functions to spread hulls apart or return closer together.