Tcas IV

Some articles on tcas iv, tcas:

Traffic Collision Avoidance System - Versions of TCAS - TCAS IV
... TCAS IV uses additional information encoded by the target aircraft in the Mode S transponder reply (i.e ... TCAS IV has replaced the TCAS III concept by the mid 1990s ... One of the results of TCAS III experience has been that the directional antenna used by the TCAS processor to assign a bearing to a received transponder reply is not accurate enough to generate an ...