Science: Comforting Tracks

The air lanes now have a new and friendlier look to airplane pilots. Dotted along the air lanes at 100-mile intervals (or less) are squat steel towers topped with curious structures like horizontal wheels. These are "omniranges," which tell a wandering airplane pilot where he is, where he is heading, and how he can get elsewhere quickly if he needs to. Last week the Civil Aeronautics Administration announced that 300 of its projected 409 omniranges were in operation.

Principal air navigation aids in the days before "omnis" were radio ranges. They were better than nothing, but they did not tell the...

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