AIM 1-1-23. Special training is required.

Bob Gardner

"Trent D. Sanders" wrote in message
om...
Have you ever heard of, or have any experience with a thing called the
"Transponder Landing System", a form of IFR approach using a
transponder? What is it, how does it work, does it work, do you have
to have a special "endorsement" to fly it, etc?

TDS
N2997Y