Weather hazard in aviation has been overcome by radio to the extent of: 1) warning the pilot of conditions ahead; 2) guiding him to a point above his destination. Yet many an accident has occurred because the airport was obscured by fog. This problem—to land an airplane where the pilot cannot see—has been the subject of extensive experiment with highly sensitized altimeters (TIME, Oct. 7) and with auditory radio signals. Last week in Gloucester, Mass., a new line of attack, by which the pilot "sees" the hidden field, was announced by John...

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