The USS Dahlgren (DD-187/AG-91) was a Clemson-class destroyer built for the United States Navy, launched on November 20, 1918, by Newport News Shipbuilding & Dry Dock Company in Virginia. Commissioned on January 6, 1920, the vessel measured approximately 314 feet in length, with a beam of about 31 feet and a standard displacement of roughly 1,200 tons. Her armament configuration included torpedo tubes and guns typical of Clemson-class destroyers, designed for fleet combat and patrol duties. Initially, the Dahlgren served with the Atlantic Fleet, engaging in exercises and training along the U.S. East Coast, in Mexican waters, and around Cuba and the Panama Canal Zone. Notably, she participated in the Presidential Fleet Review at Norfolk in April 1921 and conducted bombing tests on former German Navy ships off Virginia during the summer of 1921. She was placed out of commission in Philadelphia on June 30, 1922, after her initial active period. Reactivated in October 1932, Dahlgren was recommissioned and moved to the Pacific, operating along the West Coast until 1934. She returned briefly to the Atlantic and served in various fleet exercises, including a rescue operation of a Coast Guard seaplane crew in 1937. From 1937 to 1940, she participated in engineering experiments and patrols, including testing a variable-pitch propeller and escorting ships during trials. During World War II, Dahlgren's roles expanded to escort and patrol duties along the U.S. coast, including operations out of Key West, Florida. She notably rescued survivors from the steamer Pennsylvania Sun and the German submarine-claimed U.S. airship K-74. In 1945, she was reclassified as AG-91 and served at the Mine Warfare Test Station at Solomons Island, Maryland, until her decommissioning at Philadelphia in December 1945. The vessel was sold for scrapping in June 1946, marking the end of her service. The USS Dahlgren's varied operational history highlights her adaptability and significance during a transitional period for the U.S. Navy.

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