The USS Sapphire (SP-710) was a small, wooden-hulled steam yacht built in 1900 by the Herreshoff Manufacturing Company in Bristol, Rhode Island. Originally constructed as a private vessel, Sapphire was designed as a luxurious yacht with a relatively modest size suitable for private leisure use. Her construction featured a traditional wooden hull, which was typical of early 20th-century yachts, and she was powered by steam, providing reliable propulsion for her private owners. In 1917, during World War I, her owner Jeremiah Milbank of New York City enrolled her in the Naval Coast Defense Reserve, and the U.S. Navy soon ordered her into service. She was officially commissioned as USS Sapphire (SP-710) on September 14, 1917, at Brooklyn, New York. Following her fitting out at Tebo's Yacht Basin, she was assigned to the 3rd Naval District for section patrol duties. Throughout her service, USS Sapphire was primarily tasked with patrolling the waters off Execution Light. She worked in conjunction with other patrol vessels such as USS Sturdy, USS Jimetta, and USS Josephine. Her patrol duties contributed to the maritime security efforts during the war, safeguarding approaches and coastal areas from potential threats. USS Sapphire's active service concluded on November 20, 1918, shortly after the end of World War I. She was transferred from Section Base No. 7 to New York Harbor in December 1918. On December 16, 1918, the patrol vessel USS Minerva towed Sapphire to Robert Jacob's shipyard at City Island in the Bronx, where she was decommissioned and returned to her owner, Milbank. Overall, USS Sapphire served as a modest but vital part of the U.S. Navy's coastal defense during wartime, exemplifying the conversion of private yachts for military purposes and contributing to the maritime security during a critical period in history.

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