Wing Commander (Wg Cdr in the RAF and the IAF, WGCDR in the RNZAF and RAAF, W/C in the former RCAF) is a commissioned rank in the Royal Air Force and the air forces of many other Commonwealth countries. It ranks above Squadron Leader and immediately below Group Captain. The name of the rank is the complete phrase; it is never shortened to "Commander". It has a NATO ranking code of OF-4, and is equivalent to a Commander in the Royal Navy or a Lieutenant-Colonel in the British Army or the Royal Marines. A Wing Commander is usually the rank of the Officer Commanding of an RAF Flying Squadron.