Mode "S" - Rfq

[FlyingForFun]

Wrong Stuff wondered:

If I get a Mode S transponder, the TCAS of an airliner coming the other way is able to chat to my Mode S transponder and find out what level I'm at, the same as Mode C. I can't see where the negotiation is going to come in, though, because I won't have TCAS

That's not the way I understood it - I thought that the TCAS-equipped aircraft would still negotiate with the other Mode-S equipped aircraft, and the pilot would get an RA. The pilot of the other aircraft would obviously not get an RA, not having TCAS. But I'm not certain, so I've started a thead on the Questions forum to try to find out.

FFF
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[FlyingForFun]

...and, having seen the first few replies to my new thread, I have to apologise for talking complete crap on this thread!

FFF
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[iainpoll]

.........and you passed those axams, FuFu?????

[FlyingForFun]

Iain,

You mean you're meant to remember the stuff 6 months later? Oh dear, I seem to have missed that bit!

FFF
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[iainpoll]

Don't worry - I can't remember it 5 minutes after I studied it!

[Julian]

My first thought was "Heres another reason to stick an aircraft on the foreign register!"

Unfortunately even thats no escape as you are still required to equip with Mode S before being allowed to fly in UK airspace. Ramp checks will also be conducted to ensure aircraft comply!!! (Section 9.1 before anyone asks...)