The Hughes Glomar Explorer was a deep-sea drilling ship used by the CIA to recover the wreck of the Soviet ballistic missile submarine K-129.

Fullsize image: https://diqn32j8nouaz.cloudfront.net...n_fullsize.jpg



More:

https://en.wikipedia.org/wiki/Project_Azorian


Previously:

Floating Instrument Platform - GIF
P-3 Orion deploying a sonobuoy - GIF
Coastal Research Amphibious Buggy - video
Salvaging a car carrier - video
USS Thresher documentary - video