I have a Raymarine SeaTalk to NMEA converter box and that's where I was going to get the NMEA signals, but now that I have your info I'll make sure I use the NMEA output terminals from the course computer. (If the NMEA input is also open on the course computer, I might also be able to integrate the AIS into the same data stream without needing to spend $200 on an NMEA multiplexer. That would be way cool.)