The USS Pinnacle (AM-274) was an Admirable-class minesweeper constructed for the United States Navy during World War II. Laid down on February 1, 1943, by the Gulf Shipbuilding Corporation in Chickasaw, Alabama, she was launched on September 11, 1943, and commissioned on May 24, 1944. The vessel featured the typical design of Admirable-class minesweepers, which were built for fleet sweeping and mine clearance operations. Following her initial shakedown, USS Pinnacle joined Mine Squadron 11 and departed for the Mediterranean in July 1944. She arrived at Mers-el-Kebir in August, subsequently operated off southern France starting in August, and began her minesweeping duties near St. Tropez. Throughout September and October, she cleared fire support channels from Cape Martin to Bordinghera, Italy, without damage from German shore batteries. Her operations then took her to various ports including Toulon, Bizerte, Cagliari, and Palermo, conducting minesweeping and escort runs in the Mediterranean until early 1945. In January 1945, Pinnacle crossed into the Black Sea, entering through Istanbul and sweeping in shallow waters ahead of the USS Catoctin. She provided guard duties during the Yalta Conference at Sevastopol and Yalta. After repairs in Sicily, she resumed operations off Sardinia, Malta, and eventually returned to the United States in May 1945. Her post-war service included Pacific operations, notably in the East China Sea, Ryukyu Islands, Formosa, and Shanghai, as part of minesweeping efforts following Japan's surrender. Decommissioned on October 9, 1946, at Sasebo, Japan, she was transferred to the Nationalist Chinese Navy in June 1948, renamed Yung-Hsiu (MSF-48), and continued patrolling Taiwan’s coast into the 1970s. USS Pinnacle earned two battle stars for her World War II service and was struck from the Naval Register in July 1972. Her ultimate fate remains unknown.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.