Abstract: A towable cargo watercraft or boat is described that can be transported on a motor vehicle to and from the location where it is to be used. The craft includes a hollow hull comprising a rigid shell formed from plastic resin with a bottom wall, side walls and a transom extending upwardly and terminating in a wide upwardly facing open hatch. The hatch extends substantially from the bow to the stem of the watercraft and from one side of the craft to the other to allow easy access to a storage compartment inside the hull. A removable hatch cover is connected by a waterproof seal to a rim that encircles the hatch for covering and sealing the hatch when the watercraft is in use. A releasable latch is provided to hold the hatch closed during use, and the seal around the hatch maintains the watercraft in a weatherproof and watertight condition.