Originally Posted by FullWings
you're assuming that the traffic you can see is the one that has generated the RA... That may not be the case, especially as "It's night, so you have little range information, just direction." The information presented to you also depends on the type of TCAS installation and what modes you have selected; TCAS is much less accurate in displaying bearings than distances, so the actual traffic could be in a significantly different direction.
As much as 120 degrees away? Is TCAS bearing accuracy reallky
that bad (even in the worst case)?
Further, you are then assuming that you have traffic, that you can see, which is not on a collision course (could be), and traffic that is causing an RA, which you cannot see.
Also, if you can't see your 2 o'clock traffic and it isn't on TCAS then it's probably far enough away not to be an immediate risk, unlike the traffic that is causing the RA.
Probably not.
If ATC gives you an "expedite!" instruction to avoid it, it is probably quite close.
Further, in contradiction to your first quote, here you assert that traffic you cannot see, is probably far enough away.
So by your own logic, whether or not you can see your traffic, is not an indicator of proximity.
Bernd