Visual Avoidance of Mid-Air Collisions 580026

SINCE World War II the danger of mid-air collision of aircraft has increased enormously, as the number and speed of planes has increased. The Civil Aeronautics Administration has been studying the problem for several years in an effort to develop new safety standards and procedures.
This paper presents the results of some of these studies. Among the findings are: the need for a collision warning device to alert the pilot of the presence and direction of approach of other aircraft, and the need for more conspicuous paint pattern on planes.
Studies of past collisions show that many were caused by one plane overtaking another from the rear, that 90% occurred within 5 miles of the airport, and that over 50% happened at or below an altitude of 500 ft.


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