What should always precede the voice transmission in radio etiquette?

In radio communications, particularly in maritime contexts, it's essential to follow established protocols to ensure clarity and avoid confusion. The vessel's call sign is a unique identifier assigned to a ship, and using it at the beginning of a voice transmission helps to establish who is communicating.

By stating the vessel’s call sign first, the receiving party can immediately identify which ship is trying to reach them. This is crucial in maritime operations where multiple vessels may be communicating simultaneously, as it allows for clear and efficient communication. It also facilitates the proper routing of messages to ensure they reach the intended recipient.

Establishing the identity of the communicator through the call sign aligns with professional radio etiquette and enhances communication safety at sea. Other aspects, such as the destination port or the nature of the distress signal, are important but typically follow the introduction of who is speaking, which sets the stage for the ensuing message.