The USS Sylvia (SP-471), later designated USS SP-471, was a private motorboat constructed by Sam Williams in Marco, Florida. Originally owned by J. Alwood of Winter Haven, Florida, Sylvia was acquired by the United States Navy on June 6, 1917, for military service during World War I. She was officially commissioned as USS Sylvia (SP-471) on September 4, 1917. Designed as a motor vessel, Sylvia was assigned to the 7th Naval District, where she served primarily in patrol duties along Florida waters. Her operational role involved safeguarding maritime areas during the war, a common task for section patrol vessels of the era. Her name was changed on April 11, 1918, to USS SP-471 to prevent confusion with another vessel of the same name, the first USS Sylvia, which was also in commission at the time. The vessel's service was relatively straightforward, and she remained active in patrol duties until early 1919. Following her decommissioning, she was slated for sale, but her fate was dramatically altered by a natural disaster. On September 9, 1919, during the devastating Florida Keys Hurricane, SP-471 was anchored in North Beach Basin at Key West, Florida. The hurricane struck with such force that the vessel was beaten against the basin’s wall and was completely wrecked. Her destruction was part of a broader loss of eight section patrol boats in that event. Sources differ on the precise date when SP-471 was officially struck from the Navy List, with possibilities including April 24, 1919, or October 4, 1919, after her destruction. Nonetheless, her service record reflects her role as a small, privately built motorboat adapted for wartime patrol duties and her tragic end in a significant natural disaster, marking her as a modest but notable participant in the maritime history of World War I naval operations.

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