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DOCUMENT Citation Only W. Shawn Arnold.

  The oil tanker Gulfoil is located in 534 meters of water.  Built by New York Shipbuilding in Camden, New Jersey, Gulfoil is the first oil tanker to be built in the United States of America using British engineer Joseph Isherwood’s system of ship construction.  The Isherwood system used longitudinal framing instead of traditional transverse frames making the ship stronger and lighter than previous construction methods.  Sunk by German submarine U-506 in the Gulf of Mexico in 1942, the...