Aviation: Raising the Safety Margin

From Oklahoma City's Will Rogers Field one day last week, a giant Boeing roared into the air with 18 stubby antennae jutting from its fuselage. The jet that looks like a porcupine is the newest tool of the Federal Aviation Agency in its effort to check on the efficiency of the navigational aids on the nation's airways. Loaded with electronic equipment, the plane was off for its first check run at its home base, FAA's Aeronautical Center at Will Rogers Field. It will fly back and forth across the U.S., following a carefully plotted grid course, to check the strength...

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