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50 Years of Ocean Discovery: National Science Foundation 1950—2000
mentation of the Ocean Drilling Program drill holes. During this same period of time, many improvements were made to Alvin's various sampling and imaging systems and its operating depth was increased to 4,500 m.
After years of development and use, the unmanned remotely operated vehicle program at Woods Hole was finally integrated into the Alvin operational schedule with the arrival of its new support ship Atlantis. It is now up to the deep submergence user community to determine the long-term viability of manned submersibles such as Alvin.
Ballard, R.D. In press. Eternal Darkness. Princeton University Press, Princeton, New Jersey.
Ballard, R.D., W.B. Bryan, J.R. Heirtzler, G. Keller, J.G. Moore, and Tj.H. van Andel. 1975. Manned submersible observations in the FAMOUS area, Mid-Atlantic Ridge. Science 190:103-108.
Geological Society of America Bulletin. 1977. Volume 88.
Geological Society of America Bulletin. 1978. Volume 89.
Heirtzler, J.R., and X. Le Pichon. 1974. A plate tectonics study of the genesis of the lithosphere. Geology 2:273-274.
National Research Council. 1972. Understanding the Mid-Atlantic Ridge: A Comprehensive Program. National Academy of Sciences, Washington, D.C.
Turner, R. 1973. Wood-boring bivalves: Opportunistic species in the deep sea. Science 180:1377-1379.