Zc772. In June 1972, the Grayback carried a team of Navy SEALs into the coastal waters of North Vietnam as part of Operation Thunderhead. This was the last attempt during the Vietnam War to rescue American POWs held in North Vietnam.
Grayback (LPSS-574) at Subic Bay, Philippines in 1970 before underway ops. SEAL’s on pier. Right side of submarine = open hanger doors & ships diver. This picture came from a Navy sourse web page, click here!
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