You may read this:
http://en.wikipedia.org/wiki/Traffic...oidance_System
http://www.caasd.org/work/project_de...fm?item_id=153
http://www.aerowinx.de/html/tcas.html
for those who want facts and please remember the conclusion:
http://www.eurocontrol.int/msa/galle..._21Apr2005.pdf
I have been installing and testing TCAS on several aircrafts and have to say that position accuracy is really not precise on the display, therefore follow the ATC instructions first and if there is a RA command then follow the TCAS vertical manoeuver!
Never use your TCAS display as a RADAR, it is not designed for that purpose!
The only way for TCAS to be fonctioning correctly is that everybody have to follow the same rules and procedures...if not there will be other cases to discuss...I am affraid