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. ----- Original Message ----- From: "Jon Wright" <jwright@halcyon.com> To: <AIRLINE@LISTSERV.CUNY.EDU> Sent: Thursday, July 11, 2002 1:59 AM Subject: TCAS terminology > I have heard the traffic avoidance commands TCAS issues called > Resolution Advisories and Traffic Advisories. Are RAs and TAs > the same or different alerts? And on a related note, how are > TCAS commands enunciated? Are they visual, aural, or a combination? > > Ever curious, > Jon > > ------------------------------------------------------------------- > Jon Wright jwright@halcyon.com voice 425-635-0338 > fax 425-844-1403 > You've got a hard lip, Herbert. http://www.spudboy.com/~jwright