Portrait of America. U.S. trains American youth for merchant fleet. U.S.

Portrait of America. U.S. trains American youth for merchant fleet. U.S. Merchant Marine seamen must be expert gunner as well as sailors. This gun crew, operating a 20 milimeter anti-aircraft gun on a U.S. training ship, learns to function with clock-like precision. Thousand of young Americans are being turned into trained crews for merchant ships that keep the sea lanes opens fot the United Nations ear fronts.