Appendix B: Data Sources 71B.2 SeaTalk and NMEA Data DisplayThe following table provides information on the sources of datadisplayed by the RayData.Note that SeaTalk data takes priority over NMEA data.Data Own SeaTalk NMEA NotesTransducers Input SourceDepth 4 4 DBT 1Speed Through Water 4 4 VHW 2Log, Trip 4 4 — 2Temperature 4 4 MTW 2Heading — 4 HDM HDG HDT VHWPositionLAT/LON — 4 GGA RMC RMA GLL (VER 2.0)TDs — — RMA GTD 3Course Over Ground, — 4 RMC RMA VTGSpeed Over GroundDate/Time — 4 ZDA RMCWaypoint ID — 4 RMB BWCXTE — 4 RMB APB APABearing To Waypoint — 4 RMB BWCDistance To Waypoint — 4 RMB BWCRudder Angle — 4 —No fix — — GGAVariation — 4 RMC RMA HDGNotes:1. A RayData unit set up as a Master for depth data will take data fromits direct-connected transducer or (if there is no direct-connectedtransducer) NMEA, and ignore the indicated SeaTalk data.2. A RayData unit set up as a Master for speed and temperature datawill take data from its direct-connected transducer or (if there is nodirect-connected transducer) NMEA, and ignore the indicatedSeaTalk data.3. TDs Position is only available via an NMEA connection.
