השוואת שיטות

	TCAS	ניווט פרופורציונלי
תחום	תעופה וחלל	תעופה וחלל
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1989	1957
הוגה השיטה	FAA, ICAO	Lin-Hsiung Chu
סוג	Avionics system	Guidance law
מקור מכונן	Federal Aviation Administration (2017). Traffic Collision Avoidance System (TCAS II). Technical Standard Order TSO-C119c.	Knox, W. P. (1971). On optimal proportional navigation. IEEE Transactions on Aerospace and Electronic Systems, AES-7(3), 417–426.
כינויים	TCAS II, ACAS, traffic avoidance	PN, PN law
קשורות	3	3
תקציר	TCAS (Traffic Collision Avoidance System) is an airborne safety system that detects nearby aircraft using radar and mode C altitude reports, then provides traffic advisories (TAs) and recommended collision avoidance maneuvers (RAs) to flight crews. Mandated globally on commercial aircraft since 2000, TCAS is considered a last line of defense against mid-air collisions. TCAS II is the most common variant; TCAS I is a simplified advisory-only version for general aviation.	Proportional Navigation (PN) is a guidance law that generates command accelerations proportional to the rate of change of the line-of-sight angle between a pursuer and target. Introduced by Lin-Hsiung Chu in the 1950s, it became the foundation of modern missile guidance systems. PN solves the pursuit-evasion problem by ensuring that the pursuer intercepts a moving target with minimal computational overhead.