Date: 17 Nov 96 20:04:01 From: email@example.com (Scott Odle) Organization: Earthlink Network, Inc. References: 1 2 3 Followups: 1 2
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In article <airliners.1996.2410@ohare.Chicago.COM>, Francis.Jambon@imag.fr says... >TCAS-I (for small airplanes): The TCAS-I can show the position of the >other aircraft. If the other aircraft have a mode C transponder (instead >of a mode A) the TCAS-I also show altitude. I don't think that the TCAS >equiped airplanes absolutely need a working transponder (except for >altitude comparison), but they usualy have one. TCAS will not operate without a working transponder onboard or without the altitude encoding on. >For the TCAS-II (for airliners): The other airplane need a mode S >transponder. So the TCAS-II can generate traffic warnings (TA) and >resolution requests (RA) to avoid collision in the vertical plan only. If >both airplanes have a mode S transponder, the manoeuvering of the two >airplanes are coordinates. TCAS II does not require both aircraft to have Mode S. The intruder aircraft must only have Mode C. >For the TCAS-III (in project) : The TCAS can generate manoeuvering in both >vertical and horizontal plan. There will be no TCAS III. For whatever reason it will be designated TCAS IV.