Reduced Departure IntervalsOn 5th March 2014, in response to increasing traffic levels, and in order to increase the efficiency of Dublin departure operations on runways 10 and 28, whilst maintaining existing safety standards, AirNav Ireland introduced a six-month operational trial to reduce the interval between successive departing aircraft of the same category. Previously, the following aircraft was given take-off clearance when the preceding aircraft reached 1.5 nautical miles (NM) from the departure end of the runway. For the trial, this interval has been reduced to 1NM. The reduced departure intervals were successfully completed at the end of 2014 and the procedures for reduced departure intervals are now fully operational. Recent analysis of departure data has shown a reduction in the departure interval of up to 15 seconds. The all-important safety targets have been met during these trials. The minimum airborne separation standard is for 3NM to be applied between these aircraft and the trials have shown that the average separation achieved to date is 4.1NM, with the minimum being 3.5NM. |
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