What is the primary use of Channel 16 on marine VHF radios?

Channel 16 on marine VHF radios serves a critical function as the international distress, safety, and calling frequency. This channel is designated for emergency communications, allowing vessels in distress to signal for help and enabling rapid communication among vessels and shore stations for safety-related messages.

When a vessel is in danger, the use of Channel 16 ensures that emergency calls reach the widest audience, as it is monitored continuously by coast guard stations and many maritime vessels. Additionally, it is used for initial calling between vessels prior to switching to another channel for conversations, thus facilitating the coordination of communication.

While other channels may serve specific purposes like towing communications or offering navigation instructions, Channel 16's significance lies in its dedicated role for safety and emergency situations, making it essential for maritime safety practices.