The USS Manatee (SP-51) was an armed motorboat that served as a United States Navy patrol vessel during World War I. Built in 1915, the vessel was originally constructed as a private motorboat for Lawrence F. Percival of the Corinthian Yacht Club of Boston. Designed by Samuel H. Brown of Marblehead, Massachusetts, and built by Graves Yacht Yard, the Manatee featured a wooden hull and was powered by a gasoline engine, reflecting the typical design of private yachts of that era. In the fall of 1916, Percival sold the boat to J.B. Fallon, and the U.S. Navy acquired her on 21 April 1917, shortly after the United States entered World War I. She was commissioned as USS Manatee (SP-51) on 23 April 1917, indicating a quick transition from private ownership to naval service. The vessel was assigned to "distant service" in European waters, where her primary role was to support a flying boat detachment, contributing to maritime patrol and reconnaissance efforts during the war. Details about her service following the armistice of 11 November 1918 are sparse, but it is presumed that the USS Manatee returned to the United States for decommissioning and disposal. By 1 July 1920, her name no longer appeared on the Navy List, suggesting she was decommissioned and likely sold or repurposed. The USS Manatee (SP-51) is notable as an example of a private yacht adapted for wartime patrol duties, exemplifying the Navy’s practice during World War I of converting civilian vessels for military use. Her service in European waters and support of aerial operations highlight her contribution to the broader naval effort during the conflict.

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