Another presidential yacht, this time the former gunboat
USS Williamsburg. Originally built as the 234 ft, 1,800 ton private yacht
Aras in 1931, she was purchased by the US Navy in 1941 and converted to a gunboat operating mostly out of Iceland. After the war, the
USS Williamsburg was converted to a president yacht for Presidents Truman and Eisenhower. Renamed
Anton Bruun, she was then transferred to the National Science Foundation and converted to an oceanographic research vessel for 20 years. In the end, she was purchased by an Italian firm to be converted to a luxury cruise ship but the deal came apart. The ship eventually sank, was raised and then scrapped.
As a sidenote, one of the Marine security guards was Private First Class, later Private, later Private First Class Steve McQueen who was promoted 7 times and busted back 7 times due to discipline issues.
This included a 41 day stint in the brig (some might say cooler.)