German Blockade Runner SS Rio Grande: Deepest Shipwreck Ever Found

From the April17, 2017, Mental Floss "The deepest shipwreck ever found."

According to the Guinness  World Records, the deepest  shipwreck ever identified is that of the German blockade runner from WW II, the SS Rio Grande. 

In early January 1944, it was sunk by two U.S. warships in the South Atlantic Ocean.  It lies at the depth of  about 18,900 feet -- about 3.5 miles below the surface.  It was discovered on November 28, 1996, using side-scanning sonar technology.  Two days later, the company responsible for finding it, Blue Water Recoveries, confirmed the wreck using  a remotely operated  vehicle.

--GreGen