PRESTWICK, Scotland, UK—ADS-B surveillance for transatlantic flights is not only freeing up capacity in the increasingly busy oceanic skies but is also paving the way for greener crossings.
Nats said: ‘In radar airspace there is either a five nautical mile or three nautical mile minimum separation laterally between aircraft, however, over the North Atlantic it is 60nm laterally and for aircraft following on the same route it is based on time – essentially 10 minutes apart. For aircraft crossing another aircraft at the same level it is increased further to 15 minutes.’ And aircraft are given fixed speeds to make sure they don’t catch up with the plane in front. The tracks are set up after requests for…
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