Appendix A: Key Functions 67Appendix A: Key FunctionsThe function of each of the five RayData keys depends on:• The circumstances in which it is pressed: that is, the information thatis currently displayed on the screen• The way in which it is pressed: that is, whether you press the keymomentarily or press and hold it• Whether it is pressed in combination with other keysThe following table reviews the functions of all the RayData keypresses, including combination key presses, depending on how theyare pressed and in what circumstances.Key Press/ Condition / display FunctionHoldNAV P System is off Turns RayData onH System is on Turns RayData off after 3 secondsP System is on and navigational Nav Chapter main page (last used) displayeddata available via SeaTalk orNMEA; non-Nav Chapter pageP System is on and navigational Moves on to next main page in the Navdata available via SeaTalk or ChapterNMEA; Nav Chapter pageP Speed calibration Exits and saves calibration valueNAV+ÙÙÙÙÙ P Normal display First Setup page displayedP Setup page Exits Setup and validates changesNAV+ÚÚÚÚÚ P Setup page Enters self test modeP Self test mode Returns to Setup pageDEPTH P Non-Depth Chapter page Depth Chapter main page (last used)displayedP Depth Chapter page Moves on to next main page in the DepthChapterH Normal display Lighting Control page displayedP Lighting Control page Moves on to next Lighting Control optionP Speed Calibration mode Changes calibration run numberContinued overleaf