Before revision: The clearance scheme, used by ATC , can be easily remembered using the acronym "CRAFT"Clearance Limit - Route - Altitudes - Frequencies - Transponder (Squawk) En route flight is described by IFR charts showing navigation aids, fixes, and standard routes called airways.
After revision: in the U.SThe clearance scheme, used by ATC , can be easily remembered using the acronym "CRAFT"Clearance Limit - Route - Altitudes - Frequencies - Transponder (Squawk) En route flight is described by IFR charts showing navigation aids, fixes, and standard routes called airways.