ACAS
Dear All,
I have several questions concerning ACAS.
1.Can anybody tell me if the TCAS 2 requires a mod S transponder?
(is there an aircraft equipped with A/C transponder only, having a TCAS2 on board)
If yes- what happens if an ACAS equipped interrogates no mode s, but also acas equipped aircraft?
And how many aircraft out there flying without mode s in European airspace?
2. How often do the pilots switch off RA mode and use TA only,why and when?
Thanks in advance