On April 10, 1963, the USS Thresher (SSN 593) sank during deep-diving tests about 220 miles (350 km) east of Boston, Massachusetts, killing all 129 crew and shipyard personnel aboard. Her loss was a watershed for the U.S. Navy, leading to the implementation of a rigorous submarine safety program known as SUBSAFE. The first nuclear submarine lost at sea, Thresher was also the first of only two submarines that killed more than 100 people aboard; the other was the Russian Kursk, which sank with 118 aboard in 2000.
After hearing about the disaster, the young son of skipper CDR John Harvey made this crayon drawing of the sub lying on the ocean floor. The drawing is now in the collection of the U.S. Navy Museum in Washington, D.C.
Source: U.S. Naval Institute
Station HYPO 
10 April 2022 at 15:56
May they all Rest In Peace.
Jim King
CTOC Ret.
LikeLiked by 1 person
22 May 2022 at 10:18
I would recommend the book Silent Steel by Stephen Johnson which tells the story of the mysterious death of the USS Scorpion.
LikeLike
11 April 2022 at 05:22
Agreed, may the entire compliment of USS THRESHER rest in peace. Ditto, USS Scorpion (SSN-589). I well remember the day I first heard of THRESHER’s (and SCORPION’s) loss. On 10 April 1963 I was fifteen years old and living in Crestwood, New York. My father had been out of Admiral Rickover’s submarine nuclear Navy for a little under two years at that time. After hearing of THRESHER’s loss, I wrote a letter to Admiral Rickover and suggested the Navy fit arms to the Bathyscaphe. It was a handwritten letter, and, of course, very much from the heart. Thank you, Mario, for your annual reminders of the losses of both THRESHER and SCORPION. We who love the Navy and the men and women of the Navy will never forget. Andy McKane.
LikeLike
11 April 2022 at 20:47
Tough learning curve.
LikeLike