qv = also in Glossary

I

    • ILS

      Instrument Landing System (radio ground aid to assist aircraft to land)
    • Impressed (aircraft)

      Civil aircraft brought into military service
    • Inactive

      Term relating to status of military airfield closed to flying but not necessarily abandoned, as can be used for e.g. ground duties
    • Inland Area

      RAF organisation (1920-1936)
    • Intruder

      Aircraft used to attack targets of opportunity in enemy territory
    • IRBM

      Intermediate Range Ballistic Missile
    • Iris Hut

      WW2 airfield support building

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