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A fluid transport system including a fluid transfer assembly, a supply of dry gas and a tube. The fluid transfer assembly includes a pipe for transporting a cold fluid and a vapor barrier surrounding the pipe. The tube is connected to the the supply of dry gas and the fluid transfer assembly, and lo

A fluid transport system including a fluid transfer assembly, a supply of dry gas and a tube. The fluid transfer assembly includes a pipe for transporting a cold fluid and a vapor barrier surrounding the pipe. The tube is connected to the the supply of dry gas and the fluid transfer assembly, and located at least partially within the fluid transfer assembly. The tube transfers gas from the supply of dry gas to the fluid transfer assembly throughout at least a segment of the tube within the fluid transfer assembly.

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A fluid transport system including a fluid transfer assembly, a supply of dry gas and a tube. The fluid transfer assembly includes a pipe for transporting a cold fluid and a vapor barrier surrounding the pipe. The tube is connected to the the supply of dry gas and the fluid transfer assembly, and lo

A fluid transport system including a fluid transfer assembly, a supply of dry gas and a tube. The fluid transfer assembly includes a pipe for transporting a cold fluid and a vapor barrier surrounding the pipe. The tube is connected to the the supply of dry gas and the fluid transfer assembly, and located at least partially within the fluid transfer assembly. The tube transfers gas from the supply of dry gas to the fluid transfer assembly throughout at least a segment of the tube within the fluid transfer assembly. d together. 14. A combination according to claim 1, wherein the exterior surface of said shield is coated with a coating effective to provide corrosion-resistant protection to said shield. 15. A combination according to claim 1, wherein said air gap is between about 1 mm and about 30 mm wide. nd-aft extending axes, each of said propellers including a plurality of blades projecting radially relative to the respective one of the first or second axes, with at least some of the blades of the propellers being provided with at least one knife extending therefrom in a direction that is generally parallel to the respective axis. 18. An aquatic vegetation shredder, comprising: a watercraft; a first vegetation chopping and propulsion unit supported on the watercraft adjacent the stern end; and a second vegetation chopping and propulsion unit supported on the watercraft adjacent the bow end, each of said vegetation chopping and propulsion units being operable to comminute vegetation and propel the watercraft through water, said vegetation chopping and propulsion units being generally similar in construction so as to similarly effect comminution of vegetation as well as propulsion of the watercraft, said first vegetation chopping and propulsion unit comprising a first pair of propellers mounted on the watercraft for rotation about a respective one of a first pair of laterally spaced, generally fore-and-aft extending axes, said second vegetation chopping and propulsion unit comprising a second pair of propellers mounted on the watercraft for rotation about a respective one of a second pair of laterally spaced, generally fore-and-aft extending axes, each of said propellers including a plurality of blades projectin