Transcribed from Eugene Register-Guard, Eugene, OR, June 23, 1971, p. 11A:
Group asks speed limit on planes flown by eye
WASHINGTON (AP) — Pilots and air controllers want the government to clamp a 288-mile-an-hour speed limit on aircraft being flown by eye and not by radar.
The proposal stems from a June 6 collision of a Marine Phantom jet and an Air West airliner. The military plane was flying visually while the airliner was under radar instrument control.
The Professional Air Traffic Controllers Organization (PATCO) Monday asked the Federal Aviation Administration to require aircraft flying faster than 250 knots, which is 288 m.p.h., remain in communication with air traffic controllers.
“Other steps must follow, such as requiring transponders in all registered aircraft, and the development of proximity warning systems,” they said.
“In recent years, due to the increased aircraft density of military, general aviation and commercial traffic, the long practiced see-and-be-seen principle of visual flying has become obsolete,” they added.
“The internal complexity of the cockpit, combined with increased speed of modern airplanes and the rules of visibility vs. human reaction time, makes it impossible to continuously comply with visual standards of present regulations.”
The joint statement urged also that the FAA require all aircraft flying 10,000 feet or more above the surface be equipped with radio beacon transponders, for identification purposes, as well as with two-way communications with air traffic control.