Abstract: The watercraft dry storage assembly includes two generally cylindrical bladders that are inflated to lift a boat from the water and hold the hull in a raised position. Each bladder is made from a scrim encased in a flexible plastic. The scrim is substantially non-stretchable. Air fills the bladders until each inch of bladder material is tensioned in a direction parallel to a long axis of the bladder by a force of at least 5 pounds and in a transverse direction by a force of at least 10 pounds. A plurality of straps encircle each bladder. Rings on the ends of each strap are connected by coupler assemblies to secure both bladders together. The straps are attached to the bladders in selected positions along the length of the bladders.

Abstract: The watercraft dry storage assembly includes a cylindrical port bladder and a cylindrical starboard bladder. Both bladders are made from sheet material with a substantially non-stretchable polyester or nylon scrim encased in a poly vinyl chloride plastic, a urethane plastic or a mixture of poly-vinyl chloride and urethane. The bladders are attached to each other. A blower system blows air into the bladders to lift a boat hull out of the water. The blower system also sucks air out of the bladders to lower the boat into the water. A guide system indicates the location of the bladders under the water and guides the bladders as they are inflated. One or more envelopes with open tops are attached to the bladders if required and receive rudders, keels and propellers as they are raised by the bladders. After the open tops are raised above the water, water in the envelopes are pumped out by a pump.