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A Station hack , in Royal Air Force jargon , is a utility aeroplane assigned to an RAF air station or squadron -LRB- that normally flies another type of aircraft in its role -RRB- , and utilised for run-of-the-mill activities , including delivering to , or collecting from , other airfields personnel , spare parts , equipment , or documents ; activities that would not be considered worthy of the tactical , strategic , or larger transport aeroplanes that might be operated from the same air station .. Royal Air Force. Royal Air Force. The term is derived from the equestrian term for a horse used by competitive riders for everyday , run-of-the-mill riding , as opposed to those used for competitive riding .. horse. Hack ( horse ). Category  : Royal Air Force. Royal Air Force. Royal Air Force. Category  : Military slang and jargon