USS Vergana (SP-519), later OYP-519, was a United States Navy patrol vessel in commission from 1917 to 1919. Vergana was built in 1897 as a private steel-hulled, schooner-rigged steam yacht of the same name by T. S. Marvel at Newburgh, New York, for F. S. Flower of New York City. Flower later sold her to Wilbert Melville of Los Angeles, California, who in turn sold her to stationer and printer Charles H. Crocker in either late 1916 or early 1917. By the time the United States entered World War I on 6 April 1917, she was registered at San Francisco, California, and home-ported at Belvedere Cove, California.