Chapter 1: Introduction 3D3032-1222Data DisplayedThe RayData can display the following additional items of data, if theappropriate information is available over a SeaTalk or NMEA interface:• Heading• Locked heading• Position, as Lat/Long or TD• Speed over ground (SOG)• Course over ground (COG)• Waypoint number• Bearing to waypoint (BTW) and distance to waypoint (DTW)• Time and date• Cross track error (XTE) distance• Time to go (TTG), estimated time of arrival (ETA) and velocity madegood (VMG) to the next waypoint• Boat heading and rudder angleFacilitiesIf the primary position data is lost, the RayData performs deadreckoning calculations from the speed and heading data (if available),and provides a DR position.When heading information is available, the heading can be locked with asimple keypress. The Locked Heading display then shows the lockedheading (Course to Steer) and the actual heading, plus a graphic off-course indication.
