Radio Compass

Flying in the densest fog will soon have no terrors for the aviator. On the airway between Dayton, Ohio, and Moundsville, W. Va., the Army Air Service has installed a "radio compass," with electric oscillations flashing between the towers at either end of the airway. An aviator flying exactly on the course hears only dashes; if his plane turns to left or right of the course and a coil in his receiving equipment is at an angle to the course, he hears a warning signal, dash and dot, or dot and dash, as the case may be.

In a final test, Lieut. George W. Goddard flew between the two towns in a haze of very low visibility; without paying the slightest attention to possible landmarks, he kept his course with practically no deviation.