This ARP is intended to cover all external lights on the tanker and fixed wing receiver airplanes used to accomplish aerial refueling. This ARP describes lights used for two basic types of aerial refueling: The Probe and Drogue@ and the Boom/Receptacle method. Purpose The purpose of this ARP is to set forth the basic considerations and criteria which the design engineer should observe when designing an Aerial Refueling Lighting System. In case of conflict between this ARP and existing military specifications the military specification will take precedence@ unless a waiver is obtained.