BULL... the pilot with Mode S gets the warning... but it reads all
Transponders..
BT

"EDR" wrote in message
...
In article et,
Steven P. McNicoll wrote:

There he was, holding for takeoff, ready to go, transponder alive, and
he
gets bitched at by the tower for "causing problems with the airliner's
nav
on final, switch transponder to standby."

Makes sense to anyone ???

Sounds like TCAS

TCAS only works with Mode-S transponders.