Thomas Borchert wrote in
:

Also bear in mind the growing amount of Mode S transponders
which transmit regardless of interrogations.

Well, I disagree. Also, what about those S-mode transponders? If they
transmit, that's great!

Anyone know for sure? I certainly was not aware of that (and doubt that it
is true). I believe the original poster may be confusing a Mode-S
transponder with a Mode-S transponder which is part of a TCAS-type system.
They do indeed transmit without interrogation, but that transmission is not
on the same frequency (i.e. it's a "fake" interrogation).

There is obviously no reason why one could not be made to "auto-transmit."
The question is, do they? [Now where *is* that spec sheet?]

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James M. Knox
TriSoft ph 512-385-0316
1109-A Shady Lane fax 512-366-4331
Austin, Tx 78721
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