vi RAYDATA Installation and Operation HandbookPosition ........................................................................... 55Time & Date ................................................................ 55Waypoint/Bearing/Distance ............................................. 56BRG/DTW/COG/SOG ................................................ 56TTG/ETA/VMG ........................................................... 57Heading .......................................................................... 58Boat Heading and Rudder Angle ................................. 58Locked Heading .............................................................. 59Locking and Unlocking the Heading ............................. 59Changing the Locked Heading .................................... 60Locked Heading Over-ride .......................................... 60Chapter 7: Problem Solving ............................................. 617.1 Introduction ..................................................................... 617.2 Fault Finding ................................................................... 627.3 Absent Data .................................................................... 627.4 Self Test Mode ................................................................ 637.5 Factory Reset .................................................................. 637.6 Maintenance ................................................................... 647.7 Servicing ......................................................................... 64Appendix A: Key Functions ............................................. 67Appendix B: Data Sources ............................................... 69B.1 Possible Configurations ................................................... 70B.2 SeaTalk and NMEA Data Display ..................................... 71Appendix C: Specification ............................................... 73Glossary ............................................................................. 75G.1 Terms ............................................................................ 75G.2 Abbreviations ................................................................. 75Index ................................................................................... 77