Hi, Just looking around at what is available in the way of message sender for APRS has any-one looked at the following http://www.navmanwireless.com/oem/gps/gps-data-terminals-maps/mdt-860-oem http://www.navmanwireless.com/oem/gps/gps-data-terminals-maps/mdt-850-oem Any input welcome good or bad.. 73 Phillip ZL2TZE