My former company operated some 737 300 where you had the possibility to switch between the normal indication and the indication of the actual FL of the other traffic. That means if we were at FL 300 and the other traffic was at 310 we could switch the indication from +10 to FL310.
Some of the 737s also had the traffic display integrated into the vertical speed indicator.
That was about two years ago in central europe
Last edited by herbert23; 23rd Dec 2008 at 19:05.