SEATTLE, July 8 /PRNewswire-FirstCall/ -- This summer Alaska Airlines began testing next-generation flight procedures at Seattle-Tacoma International Airport (Sea-Tac) that will allow the airline and its sister carrier, Horizon Air, to reduce their environmental impact during airport approaches. Dubbed "Greener Skies," the project in cooperation with the Port of Seattle, The Boeing Company and the Federal Aviation Administration (FAA) is focused on using satellite-based flight guidance technology pioneered by Alaska Airlines to descend more efficiently and reduce aircraft fuel consumption, emissions and noise in the Puget Sound region. The airline is seeking FAA approval for the procedures, which could ultimately be used by all properly equipped carriers at Sea-Tac. Testing began June 16 on an Alaska Airlines Boeing 737-700 aircraft during a noncommercial flight.