The NMEA protocols used for navigation on maritime vessels can also be received over a UDP/IP datagram port. The NMEA0183-over-UDP port driver supports listening on a UDP network port on the YAAC host computer, and expects a NMEA-0183 or AIS "talker" host to be configured to send UDP datagrams to the YAAC host at the configured port. Note that, because of the connectionless behavior of UDP, the "talker" has to actively decide to send traffic to YAAC; YAAC's opening of a UDP port does not force the other end (if any) to do anything about it. YAAC only recognizes sentences sent by GNSS navigation receivers and by the AIS-Dispatcher application (these latter also requires use of the AISDecoder plugin for YAAC, as the data provided by AIS-Dispatcher is only AIS data, not conventional GPS/GNSS navigation data).
The configuration for a NMEA-0183 over UDP connection includes: