So next update on my #RaspberryPi boat system. I've used #RaspberryPico to read NMEA0183 stream from #dAISy HAT and send it into CM4 running #SignalK. What is #AIS? It's automatic identification system and every bigger ship is using radio to send out it's status, WGS84 location and that little red board is able to intercept transmission and spit out #NMEA0183 sentences via UART these are parsed and ship is displayed on map. Data are sufficient to detect collision courses and avoid them.