Raymarine DSM300 User Manual

Also see for DSM300: Installation manual Install guide

Contents

Raymarine DSM300 User Manual Manual pdf 31 page image

Chapter 3: System Setup 31Bridge NMEA HeadingThe display unit sends NMEA input data to the SeaTalk bus. The Bridge NMEAHeading option can be used to prevent NMEA heading data being bridged ontothe SeaTalk bus.For example, if you have a course computer connected on SeaTalk and NMEA, andan active compass connected on NMEA (for MARPA), SeaTalk data overridesNMEA data in the course computer.You should therefore switch OFF the Bridge NMEA Heading option to ensure thecourse computer receives the same NMEA heading input as the rest of the system.NMEA-Out Set UpThis option lets you disable the transmission of specific NMEA sentences, whichmay be necessary if you have other instruments sending the same data as yoursounder.For example, if the DPT (depth) sentence is set ON but the sounder’s transducer isdesigned to sense temperature and speed only, the depth value will betransmitted as zero. If you also have an ST60 Depth instrument installed, theremay be confusion between the zero depth sent by the sounder and the actualdepth sent by the ST60. Turning OFF the DPT sentence disables the reading fromthe sounder.The factory default for all NMEA sentences is transmission ON. Disable thesentence by selecting the OFF soft key.The following table displays the available NMEA sentences and their meanings.Table 3-2: NMEA SentencesSentence MeaningAPB Autopilot Sentence “B”BWC Bearing & Distance to WaypointBWR Bearing & Distance to Waypoint – Rhumb LineDBT Depth Below Transducer (see note below)DPT Depth (see note below)MTW Water TemperatureRMB Recommended Minimum Navigation InformationRSD Radar System Data