Duncan Smith (Dublin Fingal, Labour) | Oireachtas source

The IAA is clear that it is not responsible for the issues related to noise, which is fair enough, but it will be aware of the history of the development of the north runway, as it is called, and the many years of consultation regarding an east–west-takeoff flight path for the purpose on insulation schemes. The thinking was that aeroplanes would depart the runway in a straight flight path and not bank or turn before having travelled 5 nautical miles or reached an altitude of 3,000 feet. Do those measurements relate to any of the IAA's safety thresholds? On the basis of the IAA's information, we are talking about 150 m, 650 m and 30° banking. Where do the 5 nautical miles and 3,000 feet come from?