THE EFFECT OF DISPERSAL ON SECURITY AT ROYAL AIR FORCE AERODROMES. Memorandum by the Assistant Chief of Air Staff (Intelligence). The dispersal of aircraft, Air Force equipment, bombs and stores of all kinds as a precaution against air attack has made it impossible for the Royal Air Force to provide the same degree of security against sabotage or malicious damage as in the past. The Royal Air Force is, therefore, forced to rely more and more on centralised security measures to prevent ill-disposed persons approaching aircraft and stores.