Glomar Explorer
GSF Explorer, formerly USNS Hughes Glomar Explorer (T-AG-193), was a deep-sea drillship platform built for Project Azorian, the secret 1974 effort by the Central Intelligence Agency's Special Activities Division to recover the Soviet submarine K-129. == Construction == The ship was built as Hughes Glomar Explorer in 1971 and 1972 by Sun Shipbuilding & Drydock Company for more than US$350 million (about $1.7 billion in 2024) at the direction of Howard Hughes for use by his company, Global Marine Development Inc.