Next week Southwest Airlines Co. changes the way it flies, a major milestone in the push to modernize the nation's air travel system. For passengers, the last 20 minutes of a flight may feel more graceful as planes glide in without revving up engines repeatedly.
On April 6, the airline will change out the cockpit software in two-thirds of its fleet, giving pilots different instruments and a new look to displays. The radical upgrade, which took three years of preparation and required retraining 6,000 pilots, will enable Southwest to fly precise satellite-based navigation approaches to airports. That should save fuel, cut noise and reduce delays.
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