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Fred Spiess was a pioneering American oceanographer, naval officer, and marine engineer. A graduate of UC Berkeley (B.S. and Ph.D.) and Harvard (M.S.), he served in the U.S. Navy during World War II before joining the Scripps Institution of Oceanography in 1952. Spiess developed groundbreaking deep‑sea research tools, including the Deep Tow vehicle, and advanced the use of acoustics for seafloor mapping, helping shape modern oceanographic exploration. He served as director of Scripps’ Marine Physical Laboratory and was recognized with major honors such as the Maurice Ewing Medal and election to the U.S. National Academy of Engineering. In 1980 and 1981 he joined the Jack Grimm Titanic search expeditions as chief scientific consultant, helping operate and interpret sonar and deep‑towed data