restricted airspace e g u201c turn left u201d if it has been determined that a pilot has entered restricted airspace a message may be played instructing the pilot to tune to a particular radio frequency or take other action to contact ground controllers to advise of his status and thus avoid a possible mistaken shoot down incident note that in some instances where airspace is crowded suitable modifications may be made to the system to prevent false alarms for example approaches to reagan national airport in washington d c necessitate that aircraft approaching the airport also are approaching the restricted airspace surrounding the capitol as the system is ground based and not aircraft based it is a simple matter to reprogram warning parameters accordingly for each airport or zone such that the pilot of a plane landing at national airport is not distracted by numerous false alarms indicating the proximity of restricted airspace the system may be programmed to indicate whether or not the pilot is on the correct approach path and indeed this is already a feature of the airscene u2122 software and provide restricted airspace warnings only if a significant deviation occurs from the approach path and the course heading indicated a possible breach of restricted airspace fig1 illustrates one embodiment of the auto warning system of the present invention in the embodiment.