Why can't I see target names when using NMEA2000?
AIS name messages were only added to the NMEA2000 specification fairly recently (in 2010). It took the NMEA standards organisation some time to define the structure of these messages.
Individual manufacturers used their own messages for Class B vessel names on the NMEA2000 network. This meant that their own AIS equipment could communicate with each other but not to equipment from other manufacturers.