Science: Invisible Convoy?

A solution to the transportation problem was proposed last week by two top-flight U.S. engineers (Vladimir Yourkevitch, designer of the Normandie, and Frederick B. Woodworth, Smith-Meeker Engineering Co.'s radio chief): a covey of small (2,000-ton) cigar-shaped concrete ships, lying low in the water with about a foot of freeboard. The ships are to be without superstructure, without crews, self-powered by diesel engines, controlled by radio from a single armed mother ship (corvette or destroyer). Advantages: the ships would be tricky targets, almost invisible to a submarine or from any distance at sea; loss...

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