In controlled airspace, when must an additional report be made without request?

An additional report must be made without request when leaving any assigned holding fix in controlled airspace to ensure that air traffic control (ATC) is aware of your position and intentions. This reporting requirement allows ATC to maintain a safe and orderly flow of air traffic, ensuring that they can effectively manage the aircraft in their airspace.

When an aircraft is departing a holding fix, it is crucial for ATC to know the aircraft's new position and trajectory to provide appropriate separation from other aircraft. This communication helps ATC anticipate and manage traffic flow and maintains safety standards in busy airspace settings.

While entering a new sector, initiating a descent, or completing the final approach may involve communication with ATC, these actions typically do not require an additional report without request unless specifically directed by air traffic control.