Showing papers on "Collision avoidance published in 1969"

Aircraft lighting system

Abstract: An aircraft lighting system includes a pair of forwardly facing flash lamps on the wing tips which flash at the same repetition rate but wherein the flashing of one lamp is delayed by a predetermined time interval from the flashing of the other lamp to provide a distinctive flash pattern at the forward part of the aircraft to aid in a collision avoidance.

Aircraft collision warning system

Abstract: An aircraft collision avoidance system and method involves transmitting a stable reference frequency from a synchronous satellite to aircraft in a region being monitored. Each aircraft in the region receives the reference frequency and transmits a carrier, modulated with the received reference frequency, to other aircraft in a collision avoidance zone. At the other aircraft, an indication of impending collision is provided by measuring the rate of change of the carrier Doppler frequency shift received thereby from the first named aircraft. Sync pulses periodically modulate the reference frequency transmitted from the satellite for aircraft ranging and data control purposes. To limit the collision warning zone relative to each aircraft, the receiver thereof is deactivated at a predetermined time after each sync pulse is received from the satellite.

Collision avoidance readout on air traffic control radar beacon systems

Abstract: A system for transmitting collision avoidance maneuvering information together with conventional air traffic control information by the same aircraft transponder. The transponder includes gating apparatus for adding in a serial format both the maneuvering and the control information in order to transmit a single combined response to a single air traffic controller interrogation.

Human Factors and the Collision Problem

Abstract: Everyone now knows that radar has not fulfilled expectations as a means of preventing collision at sea, and that, because of this, its legal status is merely that of an aid to navigation. Nevertheless, everyone seems to feel that such a good technical instrument should enable ships to proceed safely in fog without reducing speed, and the fact that the collisions per fog day have increased by about thirty times in the fifteen years since radar became operational, shows that many mariners are in fact relying on it for collision avoidance. During these fifteen years, many papers have been published pointing out the dangers and giving advice, but in spite of this, the number of vessels involved in collision every year seems to have settled down to a constant figure of about 1700, or 7 per cent of the world fleet.

Study of Advanced Electronic Applications to Aeronautical Display and Control Problems

Abstract: Advanced electronic applications to navigation, data transmission, and airborne collision avoidance in general aviation aircraft and to simulated displays for low visibility landing

Navigation Requirements and Design of a Control System for a Surface Effect Ship

Abstract: This paper discusses preliminary results of research sponsored by General Dynamics in the development of a cost-effective conning system for a merchant surface effect ship. Although its conclusions show, at best, only the desirable goals of initial ship operation and evaluation, yet it describes problem areas and requirements for ship positioning and collision avoidance. Operational requirements of personnel and changes from traditional maritime practice are considered. The allocation of conning workload among personnel and alternative conning techniques are reviewed for ship speeds up to 100 knots.