Following numerous other aircraft across the North Atlantic I have managed to sweep the WX radar down and pick up positive returns on some of these aircraft that we also had visually. On our aircraft the TCAS tags are presented on the same Nav Display as the WX radar. It is quite interesting to see the radar target and the TCAS tag diverging by quite a lot mainly in the lateral sense. Guess thats why we don't use TCAS to separate ourselves uless its an RA and then it is only in a vertical manouvre.
