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3/14/2012--Seattle, WA, USA..At Seattle's Seatac Airport, Alaska Airlines First Officer Andrew Blank (right)  and Captain Ted Leenerts (left) start pre-flight checks in a Boeing 737. Alaska Airlines is using Next Generation (NextGen) air traffic control systems to help lower fuel costs through more efficient flight paths and descents in airports...SOURCE WIKIPEDIA: The Next Generation Air Transportation System (NextGen) is the name given to a new National Airspace System due for implementation across the United States in stages between 2012 and 2025 The Next Generation Air Transportation System (NextGen) proposes to transform Americas air traffic control system from an aging ground-based system to a satellite-based system. NextGen GPS technology will be used to shorten routes, save time and fuel, reduce traffic delays, increase capacity, and permit controllers to monitor and manage aircraft with greater safety margins. To implement this the Federal Aviation Administration (FAA) will undertake a wide-ranging transformation of the entire United States air transportation system. This transformation has the aim of reducing gridlock, both in the sky and at the airports. In 2003, The United States Congress established the Joint Planning and Development Office (JPDO) to plan and coordinate the development of the Next Generation Air Transportation System...SOURCE: ALASKA AIRLINES WEBSITE: Alaska Airlines pioneered the development of Required Navigation Performance flight guidance technology (RNP) in the mid-1990s. "RNP" technology, uses a sophisticated global positioning system, and allows aircraft to fly more direct routes and at lower minimum elevations with pinpoint accuracy. Alaska Airlines remains the only domestic carrier with a 100% RNP-equipped fleet and fully-trained crews. Alaska Airlines is working to further reduce aircraft greenhouse gas emissions and noise in the Puget Sound region. By using RNP and new procedures, aircraft can fly shorter, continuous descent