Laid down on 18 August 1943 as PT-388 by the Robert Jacob Consolidated Shipyard, City Island, NY, launched on 17 December 1943, completed on 13 June 1944 and then transferred to the British Navy and renamed HMS MTB-400 it was used for reconnaissance, patrol and escort missions.
After the Second World War it was transferred back to the US Navy on 16 October 1945 then in the following month decommissioned, but this time it was handed over to the State Department, Foreign Liquidation Commission in January 1948, whose motor torpedo boat was purchased by the Italian Navy and transferred on 24 March 1948 and under the peace treaty of World War II renamed GIS-001 and rearmed with new armament with a 20 mm/65 Breda and a quad mount with 2cm/65 Flakvierling 38, she was used as a torpedo recovery boat, then immediately renamed GIS-811.
With the creation of NATO, the peace treaty was no longer valid and with this GIS-811 was redesignated as MS-811 Motor Torpedo Boat then again renamed MS-461, in the last years she would carry out exercises and patrols until 30 June 1959 when she was decommissioned.
