Date: 13 Nov 96 02:41:21 From: firstname.lastname@example.org (Scott Odle) Organization: Earthlink Network, Inc. References: 1 2
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In article <airliners.1996.2387@ohare.Chicago.COM>, kls@ohare.Chicago.COM says... >They may only use select aircraft for service to the US, so only some >of their aircraft would need TCAS and perhaps other special equipment >for US operations. (I have no idea if they actually do this or not.) >Even if TCAS-equipped, it's possible they weren't using it if they >weren't required to do so, perhaps if it was inoperative. The only thing to add is that even if the second aircraft were a TU154, since it is a cargo aircraft (as reported by the news media)it would not be required to have TCAS in the U.S. >I *think* the other aircraft need only have a (mode C?) transponder. Correct. While TCAS can display Mode A targets it does not no their altitude and assumes co-altitude. For full functionality the second aircraft should have at least a working Mode C or Mode S.