The HF CB Radio 27MHz 40 Channel Listing document offers a quick reference to channel numbers, carrier frequencies, and assigned usage under Australian regulations. It highlights operational limits—for both AM and SSB modes—and designates specific channels for calling, emergency, or long-distance (DX) communication. By outlining permissible transmitter power, bandwidth restrictions, and usage guidance, the PDF serves as a valuable tool for anyone needing to configure or verify HF CB Radio setups. For international allocations, users should refer to their local Communications Authority.