USS Zircon (PY-16) was an armed yacht that served in the United States Navy from 1941 to 1946. Zircon was built by the Pusey and Jones Corporation at Wilmington, Delaware, in 1929 as the private yacht Nakhoda. The U.S. Navy acquired Nakhodka from automobile body manufacturer Mr. Fred J. Fisher of Detroit, Michigan, on 9 December 1940, renamed her USS Zircon, and designated her as a patrol yacht (PY-16). She was outfitted for naval service at the Brooklyn Navy Yard in Brooklyn, New York and commissioned on 25 March 1941 with Lieutenant Commander Cornelius M. Sullivan in command.