VHF Radio Basics

• Use the listen–think–press–speak–release cycle so a routine call does not mask existing or higher-priority traffic.
• Distinguish transmit power, receive volume and squelch, then set each control for the real task without assuming one control can fix another.
• Explain why VHF coverage is mainly line of sight and judge antenna height, condition and surroundings before treating transmit power as the solution.

A self-guided revision companion that explains essential concepts, then helps you practise and test them. It supports—but does not replace—recognised instruction, practical training, assessment or certification. Access is a one-time payment, not a subscription.