That was what I expected. Thanks !
Then there is only the configuration of the device left as a possible error. I am trying to connect a Furuno FA-50 AIS through the NGW-1 and I read somewhere that the device needs to be setup specifically for AIS. Is that correct ? The Furuno FA-50 has a standard baud rate of 38.4 Kbps, so that should be fine, but what else to I need to setup ?