A dracone barge is a large flexible watertight tube intended to carry a liquid cargo while towed mostly-submerged behind a ship. One large current example...

but the 59 Independent Commando Squadron was still able to rig it. A Dracone Barge was moored offshore, and piping attached that allowed aviation fuel...

invention and development of Dracone flexible barges for transporting oil, fresh water, or other liquids. (The name Dracone is allegedly a reference to...