USS Sea Leopard (SS-483), a Tench-class submarine, was the only ship of the United States Navy to be named for the leopard seal. Her keel was laid down by the Portsmouth Navy Yard on 7 November 1944. She was launched on 2 March 1945 sponsored by Hon. Margaret Chase Smith, United States Congresswoman from Maine, and commissioned on 11 June 1945.
United States Service
1940s
Following shakedown off the New England coast, Sea Leopard was ordered to the Pacific War Zone. However, hostilities with Japan ceased before the submarine's departure date; and she remained in the Atlantic. The submarine then proceeded to Key West, Florida, and she remained in Florida waters through 1946 providing services to the Antisubmarine Development Force.
In January 1947, she returned to Portsmouth, New Hampshire, for her first shipyard overhaul. Next came training exercises in the Key West area until late 1948, when she entered the Philadelphia Naval Shipyard for a Greater Underwater Propulsive Power Program (GUPPY) modernization. Upon completion, she was assigned to Submarine Squadron (SubRon) 6 and home ported at Norfolk, Virginia. In November 1949, she joined other units in cold water exercises in the Atlantic. During February and March 1950, the submarine participated in maneuvers in the Caribbean Sea.
1950s
From August through November, she joined the Sixth Fleet in the Mediterranean Sea, visiting ports of Italy, France, and Sicily, before returning home. From December 1950 to April 1951 Sea Leopard was undergoing overhaul at the Philadelphia Naval Shipyard.
For the next two years, she operated in the Atlantic Ocean and Caribbean Sea, participating in fleet training exercises. In 1951 she recovered at sea the remains of Raymond Lewis of Brooklyn, New York, a victim of the FV Pelican disaster, which involved an overloaded party fishing boat that sank off the coast of Montauk on September 1, 1951. In September and October 1952, Sea Leopard participated in NATO operation "Emigrant," and then cruised in Bermuda waters, until entering the Charleston Naval Shipyard in December for overhaul. Returning to duty in April 1953, the submarine operated in the vicinity of Newfoundland and Iceland in operation "Mariner," before returning to warmer waters in the Caribbean.
Sea Leopard'''s second deployment to the Mediterranean took place in May and June 1954 and was followed by her participation in NATO exercise "New Broom II," in which she made successful simulated attacks on NATO convoys. The submarine entered the Portsmouth Naval Shipyard in October for a six-month overhaul. The yard work was followed by her participation in "LantPhibEx," as a member of forces opposing a simulated amphibious assault on the coast of North Carolina.
In February and March 1956, Sea Leopard, along with other units of SubRon 6, set sail for the Caribbean and operation "Springboard." She then returned to Norfolk for local operations until March 1957, when she again joined the Sixth Fleet in the Mediterranean. In June, she participated in festivities celebrating the 50th anniversary of the Netherlands Submarine Force at Rotterdam, before sailing to Charleston, South Carolina, for an overhaul. Upon its completion in January 1958, Sea Leopard joined operation "Springboard" in the Caribbean and then returned to Norfolk for local operations. Joining Task Group Alfa, she participated in operations to develop antisubmarine warfare tactics and readiness, until undergoing restricted availability at Charleston Naval Shipyard (August to October 1959) to install a new high capacity battery.
1960s
During 1960, Sea Leopard operated in the Atlantic in training exercises and fleet operations until 23 October, when she entered Philadelphia Naval Shipyard for overhaul. Following completion in April 1961, she returned to Norfolk and operated locally until 19 August when she joined Task Force 69 in the Mediterranean to participate in NATO operation "Checkmate" and visit Rota, Spain; Malta and Naples, Italy. On 3 October, Sea Leopard sailed from the Mediterranean for northern Europe and NATO operation "Devil Spread."