A 1 mode s - B 1 mode s dual RA
A 1 mode s - B 1 mode c single RA/single TA
A 1 mode c - B 1 mode c dual TA only
A 1 mode s or c - B total failure - nothing nada or zip maybe splat
Are there not general piloting rules to make decision to climb or desend based on heading with the lack of a RA (if you have the time)?
Mode a is completely useless to TCAS it does not report altitude as I understand.
Also to add that I am referring to TCAS II (most do not make the distinction anymore).
The next form of collision avoidance is supposed to operate on a horizontal platform as well, there is much debate in justifying it's need.
Last edited by muduckace; 25th March 2010 at 03:03.