In 1968, the Nuclear Submarine , USS Scorpion, was lost in the Atlantic. In a nutshell, a thorough investigation showed, with the use of hydrophones, especially from the Canary Islands area, that Scorpion had abruptly changed course 180 degrees , and not long after an underwater explosion was heard. In those days torpedos were carried fully armed[ still are ] and occassionaly one would have what was called a "hot run."The torpedo would activate, and by turning 180 degrees you would trigger a fail safe device , shutting it down. The same safety devices prevented a torpedo turning and blowing up the Sub it came from. Something happened on Scorpion where the sinking was put down to the torpedo detonating. Not saying this happened here, but whatever happened, it was quick, and no distress signal was sent.
The Navy ODE;
" They have no grave but the cruel sea
No flowers lay at their head
A rusting hulk is their tombstone
afast on the ocean bed
They shall not grow old, as we that are left grow old
Age shall not weary them, nor the years condemn.
At the going down of the sun , and in the morning, we will remember them."
R.I.P.

