We shall deal only with this HF traffic, but for completeness the full chain of command on radio follows this pattern: Having come under control of its nearest ATC (Air Traffic Control), the aircraft sets its heading and calls the ACC (Area Control Centre) before requesting trans-oceanic clearance via the OACC (Oceanic Area Control Centre) on HF. Aeronautical HF BandsĪs the VHF radio only provides a local service, they use HF on the long haul Stateside. Our aircraft never die, they simply go trans-oceanic. The Tower gives them clearance for take off, sees them safely into the wild blue yonder then we never hear from them again. They may have something that is bothering them. There will be listeners, fascinated by what they have heard on the airband of the domestic radio and have gone on to a fully-fledged scanner. There will be pilots and ground crew who want to keep in touch. There will be those who have come to our hobby from the Services. For example, the last time your scribe was on an aircraft he sat next to the rear gunner. An area of listening for the genuine enthusiast and an opportunity for the writer to offload more old gags.
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