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"Terrain challenged" isn't exactly what you want to hear about the airport where your flight will be landing, but thanks to technology (thanks, technology!), it's now a cause for excitement rather than worry. Add this acronym to your travel vocabulary: RNP, or "Required Navigation Performance."
RNP is the hip, new navigation system that uses satellites and 3D calculations to devise the best route into an airport. Alaska Airlines, Southwest, Qantas and a couple others are old hats at using RNP by now, but LAN only made the switch in February to using the technology for the entire flight.
The lucky inaugural RNP route: Cusco-Lima, Peru. Though passengers onboard were more concerned with taking snapshots of the dramatic Andean scenery out the window, the pilots up front were enjoying 30.5 km shorter flying distance, 6.3 fewer minutes in the air, 644 kg less CO2 released into the air and 67.5 gallons of fuel savedand that's just on a single flight!