Transponder codes
Sorry, its another one of my random ponderings on operational ATC
What is the system with what transponder code your given?
The two cases i'm interested in are either an IFR flight, how is your code generated? And if your transisting a persons airspace do they have a set number of codes to use. eg 3100 - 3200? I've noticed if i'm pottering about VFR and go through an airspace I might be given 3250, and the next person would be given 3251