70 Version 2.0Operator’s Manual PlotPlotThere are two PLOT screens available in the basic MX420 navigatormodels. The RTE1 and WPT functions are highly interactive with thePLOT screens. The primary difference between the PLOT1 and PLOT2screens is the point of reference. The PLOT1 screen displays graphicinformation around the boat at your present position. The boat alwaysremains in the center of the screen. The PLOT2 screen displays graphicinformation around a marker. The marker always remains in the centerof this screen. If you define some of your navigation markers in theWaypoint Bank with a symbol in the first character position, the navi-gation symbol will show up in relation to your planned course on theplot screen, just as it does in the NAV1 Panorama screen. In additionto the graphic details provided by the CDU, the Plot screens providebasic navigation information, zoom-in/out capability and scaling fac-tors for the display from around 10 to 20 meters, depending on yourlatitude, out to 128 nautical miles. You will find these screens veryhelpful in many ways, and we will provide you with a couple of ideason how to make good use of the PLOT function after the screen de-scription which follows.For MX420/AIS models, a third plot screen PLOT3 is available whichshows the locations of other AIS equipped vessels relative to yourships position. Additional softkeys can be brought up by pressingthe E key. More detailed information about the PLOT3 screen is avail-able in Appendix-A page 154 of this manual.Note: The Plot screens do not show your route and cross-trackerror lines when in Great Circle Navigation mode.The following CFG menus directly impact the PLOT functions:¾ Navigation - sets a variety of important functions and alarms.Ö Rhumb Line or Great Circle navigationÖ Range units: nautical miles, nautical miles and meters (whenunder 1,000 meters), nautical miles and feet (when under 1,000feet), statute miles, statute miles and meters (when under 1,000meters), statute miles and feet (when under 1,000 feet), kilome-ters, or kilometers and meters (when under 1,000 meters)Ö Waypoint Pass Criterion and distanceÖ Waypoint Approach distanceÖ Autopilot alarm control
