USS O-13 (SS-74) was an O-class submarine of the United States Navy. Her keel was laid down on 6 March 1916 by the Lake Torpedo Boat Company in Bridgeport, Connecticut.
USS Kanawha II (SP-130)/USS Piqua (SP-130) was a yacht acquired by the U.S. Navy during World War I. She was placed into service as an escort for Allied convoys traveling across the dangerous North Atlantic Ocean. German U-boats were active in sinking Allied ships, and Kanawha II provided a valuable service as a lookout and in one instance attacked one and drove it off. Post-war she was returned to her pre-war owner in July 1919.
USS Sultana (SP-134) was a yacht acquired under a free lease by the U.S. Navy during World War I. She was outfitted as a patrol craft and was assigned to escort duty in the North Atlantic Ocean. She served honorably—rescuing survivors adrift in the water and protecting cargo ships from submarine attack—and was returned to her owner at the close of the war.
USS Christabel (SP-162) was a civilian steam yacht that was built in Glasgow in 1893 for a Scottish industrialist. She had an American owner by 1910, served as a United States Navy patrol ship in the latter part of the First World War, and afterward was returned to US civilian service.
USS Emeline (SP-175) was a steam yacht acquired by the United States Navy in World War I. She was outfitted with military equipment, including 3-inch guns, and was commissioned as a patrol craft, assigned to protect shipping in the North Atlantic Ocean. She saved the lives of survivors of shipwrecks, and provided escort protection from German submarines for commercial ships. Post-war she was sold to the highest bidder, who had the yacht sail to San Diego, California, for delivery.
USS Florence (SP-173) was a yacht leased from her owner by the U.S. Navy during World War I. She was outfitted as an armed patrol craft, and her owner, Ensign James W. Alker, was named as commanding officer of the yacht and its crew of sixteen. Florence, based out of New York City, was assigned various duties in the Long Island Sound. Post-war she was reconfigured to her original civilian condition, and was returned to her owner.
USS Halcyon II (SP-582) was a yacht acquired by the U.S. Navy during World War I. She was outfitted as an armed patrol craft and stationed in Boston harbor in Massachusetts. She spent much of the war patrolling the Massachusetts waterways for German submarines and, in 1919, was decommissioned after being damaged in a collision.
USS Lyndonia (SP-734), later known as USS Vega (SP-734) was a yacht acquired by the U.S. Navy during World War I. She was assigned as an armed patrol craft, but, at times, performed other duties along the U.S. East Coast, such as dispatch boat and training ship for the U.S. Naval Academy. Post-war, she was disposed of through sale to the public.
USS Helenita (SP-210) was a yacht leased from its owner by the U.S. Navy during World War I. She was outfitted as an armed patrol craft and initially assigned to North Atlantic Ocean duty, but found to be too lightly built for the ocean. She was then relegated to patrol of Long Island Sound and the Delaware Bay until war's end, when her guns were removed and she was returned to her owner.
USS Chichota (SP-65) was an armed yacht that served in the United States Navy as a patrol vessel from 1917 to 1918.
USS Despatch (SP-68), later PY-8, originally USS Vixen (SP-68), was a steam yacht that served in the United States Navy as a tender from 1917 to 1919 and from 1920 to 1921.
USS Hoqua (SP-142) was an armed yacht that served in the United States Navy as a patrol vessel from 1917 to 1919.
The first USS Whirlwind (SP-221) was a United States Navy patrol vessel in commission in 1917 and again in 1918.
USS Navajo III (SP-298), later USS SP-298, was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919.
USS Cigarette (SP-1234) was a patrol vessel that served in the United States Navy from 1917 to 1919.
USS Mary Alice (SP-397) was a United States Navy patrol vessel commissioned in 1917 and sunk in 1918.
USS Arcady (SP-577) was a United States Navy patrol vessel in commission from 1917 to 1919.
USS Vivace (SP-583) was a United States Navy patrol vessel in commission from 1917 to 1918.
USS Linta (SP-721) was a United States Navy patrol vessel in commission from 1917 to 1919.
USS Katrina (SP-1144) was a United States Navy patrol vessel in commission from 1917 to 1919.
United States