The story of the Glomar Explorer spans four decades and involves a Soviet nuclear missile submarine, the CIA and an eccentric billionaire.

The vessel’s history is steeped in international intrigue. The $350-million drillship – an engineering marvel that was far ahead of its time – was built for Global Marine, a company owned by Howard Hughes, the eccentric American businessman.

Over the years, Global Marine executives and others have testified in federal court that the Glomar Explorer wasn’t really built to mine manganese but was designed and constructed specifically to get something much most precious to the U.S. off the seabed.

Click here for an insightful read from The Maritime Executive.