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:
|REQUEST RELEASE DLH123
DLH123 RELEASED <initials>
DLH123 RELEASED AFTER LANDING RYR123 <initials>
The release can accordingly either be given with or without restriction, or rejected.