[TG] [TG11] A98 does not recognize AIS

[Tom - Raymarine - Moderator]

Hello Bob,

If you're getting !AIVDO, the AIS is talking to the a98. !AIVDO is an NMEA own-ship AIS status message. The counterpart message you'll see when you get closer to the water is !AIVDM, which is an other-vessel message.

By the way, be aware that we don't recommend receiving GPS data (GLL, RMC) from AIS. It's ok as long as it's getting a better-quality fix than your a98's antenna (the a98 is very, very good as long as it has a clear view of the sky, directly or through a GA150), and as long as NMEA GPS data is not then being sent back to the AIS from the a98.
This latter is prone to causing an 'NMEA data loop', where each device receives GPS data from the other and the same stale, static data cycles around, giving you a static GPS position. This is one of the many problems with NMEA0183. I would recommend turning off the output of GPS data in the AIS's setup.

Regards,
Tom