consider that from the after the fact interview, the man had no use of rudder pedals and was standing behind the pilot seat making reaching everything difficult, plus unfamiliar with electronics , their location, names and how to use them , this really is spectacular, the atc he first contacted made several mistakes and seems to be in a hurry to have this guy off his hands aviate, navigate communicate, talk about how many passengers you got aboard, what they had for lunch etc later for example. I dunno anymore since I've been out for so long, but do all planes now have transponders mandatory? some around here are so basic in electronics all the gages wind up with a key Identifying a plane does not always rely on transponders, flying a pattern is also used, never once was fuel quantity mentioned, so many things ,,,,,