TCAS, like the Mode C coding, is set to use the standard pressure setting. Changing the altimeter sub-scale does not affect the output. An aircraft squawking Mode C but not Mode S on the ground will still be seen as traffic by other aircraft on their TCAS. An aircraft squawking Mode A only will also be seen but without any altitude information.
RAs will be inhibited by the Radio Height input.
Last edited by Brain Potter; 3rd May 2007 at 11:20.