Squadron leader a flying squadron is usually commanded by a wing commander, with each of the two flights under a squadron leader. However, ground-operating squadrons which are sub-divisions of a wing are ordinarily commanded by a squadron leader. This includes squadrons of the RAF Regiment and University Air Squadrons. The rank insignia consists of a thin blue band on a slightly wider black band between two narrow blue bands on slightly wider black bands. This is worn on both the lower sleeves of the tunic or on the shoulders of the flying suit or the casual uniform. Squadron leaders are the lowest
Structure of the Royal Air Force in 1989 are listed under the airfields where they were based. The Royal Auxiliary Air Force (RAuxAF) was commanded by an Air Vice-Marshal and provided reinforcements to the Royal Air Force, which were manned by civilians and called upon in times of need or war. Although all RAuxAF units had been disbanded in 1957 it lived on in three Maritime Headquarter Units, which provided ground and air crews for the Nimrod MR.2s of No. 18 (Maritime) Group. In 1979 the RAuxAF returned to life with the formation of three Field Squadrons to provide ground airfield defence at Royal Air Force airfields. During