GPSMAP 5000 Series Owner’s Manual 5confIGurInG the unItconfIGurInGthe unItPressure—individually sets the units of measure for gauge (kPa or psi) and atmospheric(Millibars or Inches of Mercury) pressure readings.Heading—sets the reference used in calculating heading information.Auto Mag Var (Automatic Magnetic Variation)—automatically sets the magnetic declinationfor your location.True—sets true north as the heading reference.Grid—sets grid north as the heading reference (000º).user Mag Var—allows you to set the magnetic variation value.Position Format—sets the coordinate system in which a given location reading appears. Onlychange the position format if you are using a map or chart that specifies a different position format.Map Datum—sets the map datum. The default setting is WGS 84. Changing the map datum changesthe coordinate system in which the map is structured. Only change the setting if you are using a mapor chart that specifies a different map datum.Time Format—sets the time format (12 hour, 24 hour, or UTC) you want for time readings.Time Zone—sets the time zone in which you are located.Daylight saving Time—indicates whether you want daylight saving time Off, On, or Auto. Theauto setting changes turns daylight saving time on or off, depending on the time of year.Configuring Communications SettingsTo change the communications settings from the Home screen, touch Configure >Communications.Port Types—touch each port’s input/output format (NMEA std. or NMEA High speed) to usewhen connecting your unit to external NMEA or other Garmin devices.NMEA std.—supports the input or output of standard NMEA 0183 data, DSC, and sonarNMEA input support for the DPT, MTW, and VHW sentences.NMEA High speed—supports the input or output of high speed 0183 data for most AISreceivers.NMEA 0183 setup—enable or disable NMEA 0183 output sentences for sounder, route, system,and Garmin NMEA settings.To enable or disable NMEA 0183 output sentences:1. From the Home screen, touch Configure > Communications > NMEA 0183 Setup.2. Touch a setting (Sounder, Route, System, or Garmin).•••••••