Published Report (DOT/FAA/CT-94-36)

Airport (DIA). In addition, the simulation examined the
influence of the runway spacing, 5280 and 7600 feet (ft), and the
high density altitude, 5431 ft mean sea level, on no
transgression zone (NTZ) entries and nuisance breakouts (NBO's).
Controllers used final monitor aid displays to monitor approach
traffic. The simulated radar sensor had the performance of an
Airport Surveillance Radar (ASR)-9 system enhanced to provide
improved target resolution capabilities. The Multiple Parallel
Approach Program Technical Work Group (TWG) evaluated the
controllers effectiveness at resolving conflicts, the frequency
of NTZ entries and NBO's, and the ability of the system to
maintain a predetermined target level of risk (1 fatal accident
per 25,000,000 approaches). Based upon their evaluations, the
TWG concluded that the triple simultaneous ILS approach operation
at DIA was acceptable.
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