In a message dated 7/10/02 11:38:50 AM Pacific Daylight Time, RF104G@ms2.hinet.net writes: > To those who is interested in TCAS, > > You might go to FAA website and find a document called "Introduction > to TCAS II". The *.pdf file I have now is Ver.7, dated Nov. 2000. I believe > the document can answer almost all of your questions about TCAS II. > Another GREAT source of real world aviation opinion (active commercial pilots, etc.) is the: "The Professional Pilots Rumour Network (PPRuNe)" http://pprune.org/ There are many interesting forums there, one of which is an extensive discussion of the recent DHL/Russian Tupelov incident in south Germany, including TCAS/ATC command conflict aspects. Mike/SFO