USA’s Transportation Secretary, Ray LaHood, announced air traffic controllers will commence the use of NextGen satellite equipment from Dec-2009 for aircraft in the Gulf of Mexico, which will reduce separation minima, boosting system capacity (Associated Press, 14-Sep-09). The equipment will cover a 240,000 sq mile area and coverage extends to 150 miles offshore. The FAA plans to implement the system nationwide by 2013.
NextGen equipment to be used from Dec-2009 in Gulf of Mexico
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Emirates has multiple reasons for cutting back on US capacity
As the most conspicuous and largest, Emirates Airline often takes on its shoulders the increasingly difficult task of defending Gulf aviation. Emirates often single handedly represents the Gulf and "Middle East Big 3", in much the same way as Dubai carries regional geopolitics.
Just as there are significant differences between the Big 3 US airlines who have strenuously opposed the Gulf carriers in the US market, so Emirates is fundamentally different from its peers: it is longer established, has a larger home market and has had a more commercial mandate from the beginning.
Yet Emirates must compete in a market where many others would like a piece of that market. Just as Dubai Inc modelled itself in many ways on Singapore Inc, there are many who would follow the same trail. This does not lead to steady market conditions.
Certainly the policies of US President Trump have hurt aviation and tourism. But Emirates' announcement of a 19% reduction in services to the United States is less about US policies and more about the nature of the market forces that started before Trump was even a serious Presidential contender.