USS Potomac (AG-25), formerly USCGC Electra, was Franklin D. Roosevelt's presidential yacht from 1936 until his death in 1945. On August 3, 1941, she played a decoy role while Roosevelt held a secret conference to develop the Atlantic Charter.
USS Potomac at Oakland, California
Franklin and Eleanor Roosevelt with George VI and Queen Elizabeth, sailing from Washington, D.C., to Mount Vernon on USS Potomac (June 9, 1939)
Inside the wheelhouse of USS Potomac
USS Sequoia (presidential yacht)
USS Sequoia is the former presidential yacht used during the administrations of Herbert Hoover through Jimmy Carter; setting a cost-cutting example, Carter ordered her sold in 1977.
Sequoia in Washington Marina in 2008
USS Sequoia
President Harry Truman and prime ministers Clement Attlee and Mackenzie King board the Sequoia for discussions about nuclear weapons, November 1945
John F. Kennedy opening gifts with family and friends on board USS Sequoia May 29, 1963