Friday is the 63rd anniversary of the loss of U.S. Navy submarine Thresher (SSN 593) at sea. Although Newport News Shipbuilding didn’t build Thresher, shipbuilders honor the 129 officers, crew and civilians who lost their lives during the tragedy.

This anniversary also is an important reminder that quality work at NNS keeps Navy sailors safe.

On April 10, 1963, Thresher began deep dive tests off the New England coast during sea trials following an overhaul. The crew reported minor difficulties at 9:13 a.m. At about 9:15 a.m., communications with the submarine were lost. The sea trials escort ship heard sounds believed to be the pressure hull imploding at 9:18 a.m.

An investigation concluded that the loss of Thresher was most likely the result of a failed piping joint that led to the submarine’s implosion. As a result of the tragedy, the Submarine Safety program, known as SUBSAFE, was created to keep safety and quality at the forefront of shipbuilding.

To observe the anniversary, shipbuilder and trumpet player Aaron Reeves (O29) will play “Taps,” which will be broadcast via NNS’ mass area communication system at 9:15 a.m. and 9:15 p.m. Friday. Shipbuilders who work third shift or at off-site locations are encouraged to observe a moment of silence.