PaulRainbow
Well-Known Member
You are correct, the UHD2 does not even have 0183.Yup Paul, but BOTH the UHD2 7x manual and the UHD 75cv manual tell you that the unit will not receive AIS via NMEA0183. So whether the machine in question is UHD or UHD2, nmea0183 AIS wont work. All clear from Garmin's website.
Looking back, it's a little confusing, the OP says it's a UHD2, but also says he's been making 0183 connections.
Either way, both models will accept AIS via N2K (as you say), i somehow missed that when i checked the UHD2 spec. The OPs SH 2400 has N2K, so he just needs a starter kit and it's all good to go.