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RTAlvin
 CYANA
 Deep Sea Drilling Project
 expeditions
 FAMOUS
 geophysical methods
 geophysical surveys
 GEOSECS
 Glomar Challenger
 International Decade of Ocean Exploration
 IPOD
 marine geology
 marine methods
 Ocean Drilling Program
 oceanography
 submersibles
SNAdded to Thesaurus in 1983.