What is a blocked transponder ? Check this imagehttp://forums.avsim.com/user_files/17821.jpg

Actually the transponder itself is not blocked, just the registration number through the FAA database. Both tail numbers of our aircraft are blocked from public access by request of the owner and if you looked at them thru the program you are using or thru websites such as www.fboweb.com they would appear as blocked.The transponder is working fine it

One of our uncles' planes sneaking about while listening to us ? :D