Summary: Army Instructional film on the role of the Royal Army Service Corps (RASC) Air Despatch Units in supporting troops in the field through air supply. Soldiers prepare supplies for dropping by parachute from Handley-Page Hastings or Blackburn Beverley transport aircraft, including the use of Boscombe Down platforms for the despatch of up to four tons in one unit. Once loaded, the supplies are despatched from the aircraft by RASC and RAF personnel working together. The future of air transport is discussed briefly with reference to the new Argosy transport aircraft.