What is the function of the "Scan" feature on a VHF?

The "Scan" feature on a VHF radio is designed to sequentially scan all or selected channels, allowing users to monitor multiple frequencies for activity. This function is particularly useful for keeping track of communications across various channels without the need to manually switch between them. As the radio cycles through the chosen frequencies, it pauses momentarily on channels where there is activity, allowing the user to hear ongoing transmissions.

This capability is crucial in maritime communication, ensuring that users can quickly respond to important communications or emergencies as they arise. While monitoring specific channels like Ch-16 for distress calls or Ch-70 for alerts can be essential, the broader scanning functionality provides a more comprehensive means of staying aware of all possible communications. This capability is particularly advantageous in dynamic environments where the need to communicate and respond to various channels is important for safety and operational efficiency.