Dave If you don't mind building it yourself and customising some PIC code try this _http://www.g4jnt.com/GPLOCDIS.ZIP_ (http://www.g4jnt.com/GPLOCDIS.ZIP) I used a different GPS unit and found a minor bug in the code because of that but if you go down this route I can let you have the updated code if Andy has not updated his version. Regards Malcolm G0MIC