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.
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