Andrew, "A" says that the GPRMC sentence contains a valid current position fix. "V" can be considered a "receiver warning" - eg no current fix Cheers Merv (VK4ZE) _______________________________________________ ozaprs mailing list ozaprs at marconi.ics.mq.edu.au http://marconi.ics.mq.edu.au/cgi-bin/mailman/listinfo/ozaprs