The Symposium on Materials Performance and the Deep Sea was presented during the Seventy-first Annual Meeting of the Society held in San Francisco, Calif., 23—29 June 1968. The symposium was sponsored by Committees G01 on Corrosion of Metals and G03 on Deterioration of Nonmetallic Materials in cooperation with the Marine Technology Society, Bay Chapter. H. W. Dubach, U.S. Naval Oceanographic Office, served as chairman of this symposium, and J. C. Freche, National Aeronautics and Space Administration, served as co-chairman. J. V. Dwyer, Bechtel Corp., presided at the Session on Nonmetals, and F. M. Rinehart, U.S. Naval Civil Engineering Laboratory, presided at the Session on Metals. Members of the program committee consisted of: W. H. Ailor, Jr., Reynolds Metal Co.; W. M. Bejuki, Bioscience Information Corporation of Biological Abstracts; C. J. Wessel, John I. Thompson Co.; H. L. Hamilton, Ocean City Research Corp.; John Padan, Bureau of Mines; and A. W. Anderson, Washington Science Center.