Fighter Squadron Composite 111 (VFC-111) Sun Downers is a US Navy Reserve adversary squadron based at Naval Air Station Key West, Florida (USA). Currently, it operates 18 Northrop F-5N/F Tiger-IIs, of which 17 are single-seater F-5Ns and the remainder being a twin-seater F-5F, which was dubbed "FrankenTiger" and is one of only three in service with the USN, being a product of grafting the older front half fuselage of the F-5Fs into the back half fuselage of the newer low-hours F-5Es acquired from the Swiss Air Force.