Departure release At some airports it is necessary to obtain a so-called Departure Release from the radar station above before each departure, as they are responsible for the separation between IFR arrivals and departures. Whether a release is required can be found in the corresponding tower SOP of the airport. If a release is required, coordination should proceed as follows: EDFH TWR REQUEST RELEASE DLH123 EDGG DLH123 RELEASED < initials> DLH123 RELEASED AFTER LANDING RYR123 < initials> DLH123 RELEASED, CLEARANCES EXPIRES AT 1530 DLH123 RELEASED AT 1520 UNABLE, CALL YOU BACK EDFH TWR < initials> The release can accordingly either be given with or without restriction, or rejected.