Get centre point from GPSr (NMEA Mode) (Centre Point=>Get from GPSr)
Set your current centre point from your GPSr using NMEA mode. This means that any GPSr that can be connected via a serial cable and set to NMEA can use this option.
Warning: This feature is a big pain in the neck on Magellans if you want to bounce between this mode and waypoint/track/route transfer mode. On both Explorist and 330/ST/Meridian era units, you have to mess with finicky menus on the unit's panel to change modes.
Oh, and this happens to work on Bluetooth and serial. It also happens to work with Franson's GPSGate and their simulator.