The USS Harlequin (AM-365) was an Admirable-class minesweeper constructed for the United States Navy during World War II. Launched on June 3, 1944, by Willamette Iron and Steel Works in Portland, Oregon, she was sponsored by Mrs. Mary M. Doig, whose family had significant naval connections. The vessel was commissioned on September 28, 1945, and initially reported for shakedown operations in San Pedro, California, on October 19 of that year. After her shakedown, Harlequin traveled south, arriving in New Orleans, Louisiana, on December 15, 1945. Designed for wartime mine-sweeping duties, Harlequin served primarily in the Atlantic during her brief active period. She continued her operations until April 2, 1946, when she moved to Orange, Texas. Her military career was short; she was decommissioned on May 27, 1946, and placed in reserve. She was reclassified as MSF-365 on February 7, 1955, reflecting her status as a minesweeper in reserve, but she was never reactivated for service. The vessel was struck from the Navy List on May 1, 1962. In October 1962, Harlequin was sold to the Mexican Navy, where she was renamed ARM DM-20. Between 1976 and 1978, she was disarmed and converted into an oceanographic research vessel, receiving the name ARM Oceanográfico (H02). Her role evolved further when, in 1993, she was renamed ARM General Pedro María Anaya (A08). Subsequently, after April 1999, she was rearmed and transformed into a school ship, bearing the name ARM Aldabaran (BE02). As of 2007, she remained active within the Mexican Navy. Later, the vessel was sunk to create an artificial reef, which has become a popular site for divers and tourists, highlighting her maritime significance beyond her active service. Throughout her lifespan, Harlequin/Aldabaran exemplifies adaptability, serving in various roles from minesweeper to research vessel and school ship, and ultimately contributing to marine recreation and conservation.

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