Abstract
An operational evaluation of the automatic dependent surveillance system and cockpit display of traffic information (CDTI) was performed in October 2000. It provided an opportunity to examine how the use of a CDTI influences pilot/controller operational communications. Departure profiles were established to evaluate the ability of flight crews and air traffic controllers to manage long (6 nautical miles [nm]) and short (4.5 nm) spacing intervals between departing aircraft. Approximately 4% of the departures conducted when CDTI was not used and 9% when it was involved communication problems. Fortunately, controllers and pilots detected and corrected these problems in midstream. When pilots executed CDTI departures, there was an overall increase in time on frequency, more time spent under local control during the day, and departures were completed in less time when assigned the short spacing interval.
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