USS Captor (PYc-40), briefly the seventh ship to bear the name USS Eagle (AM-132), was a Q-ship of the United States Navy.
The first USS Ability (PYc-28) was a yacht in the service of the United States Navy used for anti-submarine warfare during World War II.
USS Impetuous (PYc-46) was a private yacht purchased by the Navy in August 1940 that served as a patrol boat of the United States Navy in Central America. The yacht was built as Paragon, the first of at least two Davol yachts to bear the name, in 1915 for Charles J. Davol of Providence, Rhode Island. In 1916 Davol sold the yacht to John Fred Betz, 3d of Philadelphia who renamed the yacht Sybilla III which served as the Section Patrol yacht USS Sybilla III (SP-104) from May 1917 to December 1918. Sybilla III remained in Betz's ownership until sale in 1935 to R. Livingston Sullivan of Philadelphia who renamed the yacht Arlis. On 12 August 1940 the Navy purchased the yacht placing it in commission as USS PC-454 on 16 October. The vessel was given the name Impetuous and reclassified PYc-46 on 15 July 1943. The yacht was decommissioned at Philadelphia 31 August 1944 and transferred to the War Shipping Administration for sale.
The second USS Sapphire (PYc-2) was a patrol boat in the United States Navy.
USS Amethyst (PYc-3) was the yacht Samona II taken into service in the United States Navy serving as a patrol boat during World War II. After military service the vessel was returned to civilian status in 1946 and again became the yacht Samona II until sale and subsequent names of Pudlo and Explorer.
USS Amber (PYc-6) was a patrol boat in the United States Navy during World War II, built at Long Beach, California in 1930 as the yacht Infanta for the actor John Barrymore.
A number of ships have been named Polaris:
The first USS Persistent (PYc-48) was a submarine chaser of the United States Navy.
USS Quest (AM-281) was an Admirable-class minesweeper built for the United States Navy during World War II. She was decommissioned in 1947 after wartime service and transferred to the Philippine Navy in 1948 where she served as presidential yacht RPS Pag-asa (APO-21). In 1955, she was renamed Santa Maria and, later, Mount Samat (TK-21), serving as a patrol corvette of the Miguel Malvar class. She was decommissioned from the Philippine Navy in 1970; beyond that, her fate is not reported in secondary sources.
USS Moonstone (PYc-9) was a coastal patrol yacht in the service of the United States Navy. She was built in 1929 as Nancy Baker by Germaniawerft in Kiel, Germany, later renamed Mona, and subsequently acquired by the Navy as the Lone Star on 10 February 1941. Renamed Moonstone and designated PYc-9, she was converted for U.S. Navy service in Jacksonville, Florida, and commissioned on 10 April 1941. She was named for the gemstone moonstone.
USS Cymophane (PYc-26) was a Cymophane-class patrol yacht acquired by the United States Navy early during World War II. She was used for patrol, escort, anti-submarine, and rescue operations along coastal waters.
USS Leader (PYc-42) was a Leader-class patrol boat acquired by the U.S. Navy for the task of patrolling coastal areas during World War II when there was the danger of enemy submarine activity.
USS Sturdy (PC-460/PYc-50) was a yacht converted to a patrol boat acquired by the U.S. Navy for the task of patrolling the coastal waters of the U.S. East Coast during World War II. Her primary task was to guard the coastal area against German submarines.
USS Sardonyx (PYc-12), formerly the yacht named Queen Anne (1928), was a patrol boat in the United States Navy during World War II.
The USS Alabaster (PYc-21) was a coastal patrol yacht of the United States Navy during World War II.
USS Valiant (PYc-51), originally USS PC-509, was a United States Navy patrol vessel in commission from 1941 to 1944.
USS Garnet (PYc-15) was a coastal patrol yacht in the service of the United States Navy.
USS Jade (PY-17), was a yacht in commission in the United States Navy as a Patrol Yacht from 1940 to 1945. The vessel was constructed as the yacht Athero II for Jesse Lauriston Livermore in 1926, then sold to Eldridge R. Johnson to be renamed Caroline until replaced by a much larger vessel, also named Caroline, in 1931. The smaller yacht was sold to Joseph M. Schenck of Los Angeles and New York, briefly, before being sold John R. Brinkley, M.D. of Del Rio, Texas, and renamed Doctor Brinkley. In 1940, the US Navy purchased her and renamed her Jade, after the ornamental mineral jade; she is the only Navy ship to bear this name.
USS Topaz (PYc-10) was a coastal patrol yacht in the service of the United States Navy. She was named for the gemstone Topaz.
MV Star of Malta was a passenger ferry which operated routes from Malta to Sicily in the 1950s and 1960s, notable for its sinking off Malta on 29 July 1955, resulting in the death of one crew member and one passenger. Prior to that, she had a long career under a number of different names.
United States