This subject is one of the optional modules. This option is similar to the HF Operator but no transmissions are required by the Cadets; the emphasis here is biased towards log keeping while listening to the Air Cadet HF Network. An HF aerial has now been erected at the Sqn in the form of an ‘inverted V’ aerial allowing the Cadets to monitor HF transmissions from around the world.
The Cadets must also show a working knowledge of HF, aerials, frequency spectrum and propagation. Once again, some of the theory aspects overlap into other modules of the Communicator Badge scheme such as the Amateur Radio Foundation Course where the subjects are discussed more in depth.