To receive XM weather or audio, the GPSMAP 740s requires a GXM 40 Smart Antenna with XM subscription.
The GXM 40 Smart Antenna (010-00730-00) is used to receive weather and audio service from XM satellite radio. For details on XM services please visit our XM webpage.
Once a GXM 40 Smart Antenna has been connected to the GPSMAP 640, the device can display the subscription information for the antenna.
From the Home Page in Boating mode:
From the Home Page in Driving mode:
The subscription information will now be displayed on the screen.
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