Mike!

you are correct that a mode S transponder does not require any input
form a GPS. But in some areas of the world it (will be)/(is) useful to
supply the mode S transponder with current position information so that
the mode S transponder can disseminate this information via extended
squitter.

Hans







Mike Schumann schrieb:
A Mode S transponder does not need any inputs from a GPS.

Mike Schumann

"Gary Emerson" wrote in message
t...
AH, but the real question is... would a 302 or other GPS be capable of
generating the data that could be fed to a Mode S transponder? Yeah, yeah
all the illegal stuff and your insurance would never pay if you ground
looped..., but would it work or are the certified GPS units sending out
a different data protocol?

hans wrote:
Hi Tom!

your 302 does not qualify as a certified GPS for the mode S transponder.

Best Regards


Hans


Tom N. schrieb:

I live in San Antonio, Texas, USA. We fly out of a field 15 nautical
miles away from San Antonio International airport and are basically on
final approach for a lot of jet traffic. There are also two Air Force
bases in the immediate area. There is no requirement in the U.S. to
have mode S as there will be in Europe. However, if there is less
power consumption due to fewer interrogations or if there is more
accuracy on TCAS, I would be willing to go with it. I use a Cambridge
302 for GPS.
Stefan wrote:

Tom N. schrieb:

Any opinions? I plan to install a new Becker transponder in my
ASW-28.
Should I go with the old mode C unit or pay extra for the new mode S
unit? Thanks.
Tor answer this question, it would be extremely helpful to know in
which
part of the world you intend to fly.