Raymarine Ray54 - Manual (Page 29)

Chapter 4: General Operations 19
4.5 Setting the Channel
On the microphone...
Press and release the UP arrow to increment the channel number.
Press and release the DOWN arrow to decrement the channel.
Press and hold either key for rapid channel scrolling.
On the main unit...
Rotate the CH knob clockwise to increment the channel number.
Rotate the CH knob counterclockwise to decrement the channel number.
4.6 Selecting a Weather Channel
The US National Oceanic and Atmospheric Administration (NOAA)
broadcasts continuous weather reports and severe weather alerts, as needed.
The Ray54 is programmed to receive 10 weather channels and sound an
alarm if a weather alert is received.
Press and hold the CLEAR/WX key to enter Weather mode.