An Analysis of Voice Communication in a Simulated Approach Control Environment
FEDERAL AVIATION ADMINISTRATION OKLAHOMA CITY OK CIVIL AEROMEDICAL INST
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This report consists of an analysis of simulated terminal radar approach control TRACON air traffic control communications. Twenty-four full performance level air traffic controllers FPLATC from 2 TRACON facilities participated in the simulation study. Each controller worked 2 light- and 2 heavy-traffic density scenarios for feeder and final sectors. All communications were audio recorded and transcribed verbatim by a retired FPLATC. Once transcribed, transmissions were parsed into communication elements. Each communication element was assigned a speech act category e.g., address, instruction, request, or advisory, an aviation topic e.g., altitude, heading, speed and then coded for irregularities e.g., grouping numbers together when they should be spoken sequentially, or omitting, substituting, or adding words contrary to required phraseology ATSAT, Prinzo et al., 1995. The simulated communications were compared to an analysis performed on audiotapes from the same TRACON facilities. Percentages in 3 speech act categories were comparable Instruction, 55 versus 51 Address 14 versus 26 Advisory, 24 versus 18. Detailed analyses revealed that, although there were fewer irregular communications produced during simulation, the distributions of those communication irregularities were very much the same, with the exception of aircraft call sign. The differences in those distributions were attributed to the voice recognition system it could not recognize a call sign spoken sequentially and then restated in grouped form.
- Air Navigation and Guidance
- Voice Communications
- Terminal Flight Facilities
- Radio Communications