A student From , joined Dec 1969, posts, RR:
Reply 1, posted (13 years 7 months 2 weeks 5 days 18 hours ago) and read 1608 times:
In real life, the tower only "sees" your aircraft on the radar screen if you have a unique transponder number. In the computer game it is similar: If you have it turned on, the tower will sometimes ask you to go to a different height to avoid traffic. If it's off, the tower will not care about you at all.