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Meeting	ACGS Committee Meeting 93 - Colorado Springs - March 2004
Agenda Location	5 SUBCOMMITTEE A – AERONAUTIC AND SURFACE VEHICLES 5.3 Automatic Air Collision Avoidance System
Title	Automatic Air Collision Avoidance System
Presenter	Stan Jones
Affiliation	Lockheed Martin Aeronautics
Available Downloads*	presentation
	Downloads are available to members who are logged in and either Active* or attended this meeting.
Abstract	This presentation describes the Auto Air Collision Avoidance System (Auto ACAS) developed jointly by Air Force Research Labs, Forsvaret Materielverkk (Sweden), Lockheed Martin, Boeing, and Saab AB. The design of an Auto ACAS is intended to prevent air-to-air collisions between air vehicles. The Auto ACAS is not intended to replace existing designs such as the Traffic Alert and Collision Avoidance System (TCAS) but is intended to accomplish a recovery at the last instant to prevent a collision. TCAS and other systems in use today provide situational awareness and traffic advisories to enable pilots to perform de-confliction and manual avoidance maneuvers and remain several miles apart. In contrast, Auto ACAS assumes such de-confliction and manual avoidance attempts have not succeeded and operates in a time span that does not allow for manual pilot reactions, thus it must be highly integrated and automated in operation. It automatically maneuvers an aircraft, at the last instant, to avoid an air-to-air collision. It functions in a manner similar to a pilot avoiding a collision. It is a system that is reliable, verifiable, and partially redundant, forming the last line of defense against collisions. It provides relatively nuisance-free operation and allows safe interoperability. This system was flight tested in the summer of 2003 to demonstrate that aircraft can be safely flown in close proximity with protection against inadvertent collisions and without nuisance to pilots.