What button must be pressed to change channels after the Synvoice announces which channel you are on?

To change channels after the Synvoice announces which channel you are on, pressing the change channel button is the essential action. This button is specifically designed for channel selection and allows the operator to cycle through available channels to find the one needed for communication.

Understanding the function of this button is crucial during operations where maintaining clear and accurate communication is necessary, particularly in navigational and emergency situations. The other buttons have different functions; for instance, the volume button adjusts sound levels, the selection button might confirm choices but isn't used for channel changing, and the power button is for turning the device on or off, not for changing channels. Knowing how to use the change channel button effectively reinforces seamless operation during boat crew duties.