wrote in message
...

This may be a dumb question (it sounds like all of the replies to this
thread have been far more tech-savvy than I) but is the antenna that the
xm
radio system uses specific? Why couldn't you wire their receiver into an
existing gps antenna (fixed or portable)?

The XM Radio antenna is looking for one geosynchronous satellite; it is not
looking for the 12 GPS satellites. Perhaps it would work with a GPS
antenna, perhaps not; at the very least that would require modifying the
antenna connectors since the XM Radio antenna has a connection different
from any GPS antennas I have seen.

As far as GPS inputs for moving map navigation, you can use any GPS with an
NMEA output; that includes a lot of handheld GPS units.

--
Richard Kaplan, CFII

www.flyimc.com