This is a Significant Operational milestone.
This was a very significant maritime incident. The actual aircraft involved is now in the Udvar Hazy Center of the National Air and Space Museum, Chantilly, VA.
For further details on the HH-52A see AHS Calendar May 2013.
Source: "The story of the helicopter that saved 22 sailors from burning ships was forgotten. Until now", Michael E. Ruane, Washington Post, March 4, 2016