Hi,

SeaTalk1 is a proprietary connection, which is a serial data protocol similar to NMEA 0183, here is only one “Data” wire and the information flows in both directions along the wire. SeaTalk-NG is a proprietary extension of NMEA 2000, it has totally different interface and runs with different protocol. Unfortunately, A027 can only work with Seatalk1 not Seatalk NG. If you just need the AIS function(not converting Seatalk1 messages) you can connect 12v and GND on Seatalk1 interface and it should work. Hope this helps.