XM Weather info for a GARMIN GPSMAP 740
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~ Captain Paul's response to: ~ Lucky Man ~
WOW ! You are really a LUCKY MAN. You have one heck of a unit in the GPSMAP 740. It is a fantastic combo GPS unit.\
As you know the Garmin GPS MAP 740 has the capability of receiving the\ Satellite XM weather signals, however is must have a separate XM antenna.
The Garmin web site indicates that the GXM 51 is the choice antenna for the GPSMAP 740.
According to Garmin, they describe the GXM antenna~receiver as follows:
Delivering U.S. graphical weather data directly to your compatible Garmin chartplotter, this sleek, watertight XM satellite receiver/antenna offers easy plug-and-play installation with NMEA 2000 network connectivity. The integrated all-in-one design means there is no remote “black box” to install.
The GXM 51 can be powered directly through the NMEA 2000 bus, so no separate power connection is required. In addition to conventional pole or surface mounting, the GXM 51 can also be installed on the underside of many fiberglass decks, using the included under-deck mount. More than 20 different types of weather information (including NEXRAD, lightning, wave heights, water temps, wind data, and more) can be accessed from your chartplotter screen (depending on the XM WX package selected). Plus, with a subscription, you can even use the GXM 51 to enjoy over 170 channels of quality audio entertainment via XM Satellite Radio.
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I DO NOT believe that the GXM 31 antenna can work with the GPSMAP 740 unit as the Garmin web site does NOT indicate that the unit will operate with that GPSMAP 740 series unit.
But, as the GXM 31 is about one half of the cost of the GXM 51, I suggest that you contact the GARMIN SUPPORT section at 1-800-800-1020 and get their opinion.
~ Captain Paul ~
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