How should routine messages be transmitted on a marine VHF radio?

Routine messages should be transmitted on channels designated for non-distress communication to ensure that emergency and urgent communications can take precedence. Marine VHF radios have specific channels allocated for different types of communication, and it is essential to use the correct channel for routine messages to avoid congestion on channels reserved for emergencies.

Using designated channels allows for organized communication practices, enabling vessels to share information such as navigational updates, weather conditions, and other routine operational matters without interfering with critical distress calls. This practice contributes to maritime safety as it ensures that urgent messages receive immediate attention without being drowned out by less critical communication.

The other options do not align with proper marine radio etiquette: emergency channels must be kept clear for emergencies, and transmitting personal messages or using any available channel could lead to confusion and disrupt safety communications.