A student From , joined Dec 1969, posts, RR:
Reply 1, posted (15 years 2 months 2 weeks 4 days 6 hours ago) and read 2032 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.