Hello there.
Can somebody please explain to me what a "squawk code" is and what its purpose is. For example, on a clearance frequency, I would hear "Expect flight level 230 10 minutes after departure; departure frequency 124.6 squawk 4640." Can somebody explain to me what the end of that quote means? for some reason, I think that the numbers equal a beacon frequency, but I do not see a decimal point. Can someone clear up my confusion? thanks,
Chananya