Transponders Above Class C Airspace

A recent discussion on transponders in gliders brought up the issue of a
transponder in Class C airspace. Recognizing that gliders are not required
to have one since they don't have electrical systems, the issue was whether
one is required if you are above towered airspace, such as Class C.

I had been told second hand that a transponder is required within the
lateral boundaries. A friend took the initiative and called the local FSDO
for clarification. While a transponder is not required, it is a good idea,
and it is an especially good idea to contact the tower well beforehand on
the off chance of a descent in to the airspace.


A quick survey: Since this aspect of the regs is somewhat open to
interpretation, is your local FAA person telling you that a transponder is
required? What is your personal policy and understanding of the reg? If
the consensus is that a transponder is required, should associations such as
the SSA for badges and the OLC ding accordingly?