Does anyone know what the V and A are suposed to mean in a $GPRMC NMEA sentence ? I know they are good/bad coverage but without a NMEA spec i am not sure There are some good guesses on the net Andrew Rich (VK4TEC) www.tech-software.net vk4tec at hotmail.com space - electronics - radio - aviation Report any spam in Australia to reportingspam at aca.gov.au