OPERATIONAL EVALUATION OF DME CO-LOCATED WITH ILS FACILITIES.
NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J
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The operational utility and potential of DME co-located at Instrument Landing System ILS glide slope sites was evaluated at seven airports. Procedures based on DME at ILS were established and published. Questionnaires were developed and distributed to the pilot user groups and air traffic control personnel at the selected airports in order to obtain data based on user experience. The primary advantage of DME at ILS is to the pilot user group and provides benefits to all categories of pilots. Advantage to the Air Traffic Control system is realized through more efficient utilization of air space by pilots and the availability of positive aircraft position for use in the control function. There was general consensus that DME could contribute to improved safety at any of the types of locations involved in the evaluation. It is concluded from the evaluation that the use of DME at ILS provides 1 positive distance information in the approach phase which supplies continuity for departure and enroute flight 2 improved ILS approach procedures 3 simplified cockpit procedures and 4 a reduced pilot workload. It is recommended that the use of DME at ILS be expanded to other selected airports, particularly wherein siting of navigational aids is difficult or prohibitive due to mountainous terrain, expanses of water or other environmental factors. Author
- Air Navigation and Guidance