Date: 13 Nov 96 02:41:21 From: "David G. Davidson" <firstname.lastname@example.org> Organization: http://rampages.onramp.net/~gerhard/tristar References: 1 2 Followups: 1 2
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Karl Swartz wrote: > >I forget...do -both- a/c need TCAS to make it effective? > > I *think* the other aircraft need only have a (mode C?) transponder. With a MODE C Xpndr on the other aircraft only a Traffic Advisory (TA) would be issued. To get a Resolution Advisory (RA) the other aircraft would have to have a MODE S Xpndr. So in this case, if the Saudia AC had an operating TCAS and the TU 154 had an operating Mode C Xpndr, the Saudia AC should have received a TA from TCAS.