Don Walsh (born November 2, 1931) is an American oceanographer, explorer and marine policy specialist. He and Jacques Piccard were aboard the bathyscaphe Trieste when it made a record maximum descent into the Challenger Deep on January 23, 1960, the deepest point of the world's oceans. The depth was measured at , but later and more accurate measurements have measured it at . Biography Walsh has been associated with ocean science, engineering, and marine policy for more than fifty years. He was commissioned as an officer in the United States Navy upon graduation from the United States Naval Academy in 1954. He attained the rank of captain by the time he retired. He spent fifteen years at sea, mostly in submarines, and was a submarine commander. He also worked with ocean-related research and development for the U.S. Navy. Serving as Dean of Marine Programs and Professor of Ocean Engineering at the University of Southern California, Walsh initiated and directed the university's Institute for Marine and Coastal Studies, and was a member of the board of directors for Omnithruster Inc., a manufacturer of marine maneuvering and auxiliary propulsion systems in nearby Santa Fe Springs. In 1989, his company, International Maritime Incorporated, contracted a joint venture with the P.P. Shirshov Institute of Oceanology to establish an underwater maintenance company, Soyuz Marine Service, which continues to operate in the Russian Federation. Walsh continues to support ocean sciences in his work on the Ocean Sciences Board at the National Academy of Sciences. Honors Walsh received a bachelor's degree in engineering from the U.S. Naval Academy, a Master's degree in Political Science from San Diego State University, and a master's degree and a PhD in physical oceanography from Texas A&M University. He was appointed by Presidents Carter and Reagan to the U.S. National Advisory Committee on Oceans and Atmosphere, was a member of the Law of the Sea Advisory Committee for the U.S. Department of State, and served as a member of the Marine Board of the U.S. National Research Council from 1990 to 1993. In 2001, Walsh was elected to the National Academy of Engineering. Walsh holds a faculty appointment at Oregon State University in the College of Earth, Ocean, and Atmospheric Sciences. Walsh was named one of the world's great explorers by Life magazine. In the MIR submersible, he dived on the RMS Titanic, the German battleship Bismarck, and the Mid-Atlantic Ridge. He