Yep - seen that also. And cases where the aircraft was mode-C equipped and the guy shows up with it turned off. Tower pings him gently, conversation going like this:RMarkSampson wrote:I also remember a conversation between a tower and someone arriving who did not have a transponder installed - and the airport was inside a Mode-C ring. Thought that required a special permit but alas no one seemed to raise the issue...
Tower: I am not seeing your transponder
Pilot: OK, recycling (right, thinks me).
Tower: Thanks, looks normal now.