Abstract: Diver's Caddy Vessel, adapted primarily to move beneath a seaway surface, made buoyant by the diver's exhalant into a skirt of the vessel, whereby to offset suspension weight of diver's gear, game and the like, characterized by a collapsible, bladder-like enclosure which is elongate in exterior configuration, open at the bottom, the bottom being defined by a dependent skirt and having a stringer interiorally thereof. The caddy stringer is adapted to the detachable engagement of a restraint line to the diver and/or stringer extensions for gear and game, the vessel further including a connector at one end for towing on a seaway surface.