USS Impetuous (PYc-46)

USS Impetuous (PYc-46) was private yacht that served as a patrol boat of the United States Navy in both World War I and World War II under different names.

World War I, 1917–1918
She was built in 1915 by Robert Jacob Inc., City Island, New York City as the yacht Paragon. She was then renamed Sybilla III sometime before she was acquired and commissioned into the Navy on 14 May 1917 as USS Sybilla III (SP-104). She was returned to the owner and struck from the Naval Vessel Register (NVR) on 24 December 1918. In the interwar period she was renamed Arlis.

World War II, 1940–1945
She was again acquired by the Navy on 12 August 1940, and commissioned on 16 October as USS PC-454. Assigned to the 15th Naval District, PC-454 arrived in the Canal Zone in mid-November 1940 to patrol the approaches to the Panama Canal. From November 1940 to August 1944, she performed escort and patrol operations off Central America while on constant watch for submarines.

PC-454 was named and reclassified USS Impetuous (PYc-46) on 15 July 1943. On 31 August 1944, the patrol yacht arrived in Philadelphia and was decommissioned there on 27 September, struck from the Naval Register on 14 October and sold by the War Shipping Administration on 14 June 1945.