Using Xm Audio - Garmin GPSMAP 640 Owner's Manual

Marine Mode: Using XM WX Weather and Audio

Using XM Audio

When you connect an optional GXM 40 XM antenna to your
GPSMAP 640, and you connect the GPSMAP 640 to the audio
input of your boat, you can listen to XM Audio channels.
To display the XM Audio interface from the Home screen, touch
Configure XM audio.
>
To display the XM Audio interface from any other chart or screen,
touch XM.
To select an XM Audio Channel, touch the right or left channel.
Select arrows to change to the next or previous channel within the
current category.
Volume—touch and drag the volume slider to adjust the volume, or
touch Volume to toggle the mute on or off.
Channel Guide—select a specific XM channel by name, within
the current category.
Channel entry—enter a channel using the on-screen keyboard.
Category—select the category of channels that are displayed in the
Channel Guide.
Save Preset—save the current XM channel in the Presets list.
Touch Delete Preset to remove the current channel from the list.
"Presets" is displayed as a category in the category list.
GPSMAP 640 Owner's Manual