What is the first step when switching frequencies on a marine radio?

When switching frequencies on a marine radio, the first step is to announce the change. This is critical because it allows all parties currently communicating on the initial frequency to be aware that you will be moving to a different channel. Announcing the frequency change ensures that others can either follow you to the new channel or that they are aware of your departure from the current conversation. This practice promotes effective communication and reduces the risk of misunderstandings or missed transmissions, which is especially important in maritime operations where safety and coordination are paramount.

It is essential to establish a clear line of communication to maintain situational awareness among all vessel operators and personnel.