Royal Naval Air Station Yeovilton, or RNAS Yeovilton, (IATA: YEO, ICAO: EGDY) (HMS Heron) is an airfield of the Royal Navy and British Army, sited a few miles north of Yeovil, Somerset. It is one of two active Fleet Air Arm bases (the other being RNAS Culdrose) and is currently home to the Royal Navy Wildcat HMA2 and Army Air Corps Wildcat AH1 helicopters as well as the Royal Navy's Commando Helicopter Force Merlin HCi3/4/4A and Wildcat AH1 helicopters. The site consists of 1,000 acres (1.6 sq mi; 4.0 km2) of airfield sites plus ranges and minor estates. Royal Naval Air Station (RNAS) Yeovilton is a large multi-role air station with an annual budget of some £61 million. The airfield is also home to the Fleet Air Arm Museum and the station hosts an annual Air Day in July.