When a KGWO departure cannot be immediately released, what must be issued?

In radar operations, when a KGWO departure cannot be immediately released, issuing an EDC, which stands for Estimated Departure Clearance, is necessary. The purpose of the EDC is to inform the pilots of the anticipated departure time and provide them with essential details for their flight planning. This information helps manage the flow of departures effectively, especially during periods of high traffic or when there are temporary constraints affecting runway availability.

The EDC assists in maintaining communication with the flight crew, ensuring they are aware of their expected departure status and can prepare accordingly. This is vital for air traffic management as it helps avoid miscommunication and ensures that both the flight crew and air traffic controllers are aligned on the status of the departure.

Other options do not fit this procedural requirement. For instance, ATIS (Automatic Terminal Information Service) provides essential information about the airport but does not help in coordinating immediate departures. Similarly, terms like CLEARED or DELIVERED are not the correct terminology for indicating that a departure cannot be released; they refer to other stages of the flight process. Thus, the issuance of an EDC is the appropriate action in this context.