The Army, the Navy and experimenters for air transport lines have made thousands of blind landings. But last week Pennsylvania-Central Airlineswhich has operated over the Allegheny Mountains between Washington and Cleveland for eight years without a fatalityset a ship full of passengers down on Pittsburgh's all-paved airport solely by instrumentsand thus claimed to have made the first commercial blind landing. There are Army, Navy and airline blind landing systems. The one used in this case is called "Air-Track," a radio-guided approach system designed to standardize and safeguard all landings, but still awaiting Bureau of Air Commerce approval for all weathers.
Air-Track, delayed...
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