GPSMAP ® 700 Series Owner’s ManualDevice ConfigurationSetting the Heading ReferenceYou can set the directional reference used in calculating heading information.1. From the Home screen, select Configure > Units > Heading.2. Complete an action:Select Auto Mag Var (automatic magnetic variation) to set the magnetic declination for yourlocation automatically.Select True to set true north as the heading reference.Select Grid to set grid north as the heading reference (000º).Select User Mag Var to set the magnetic variation value manually. Enter the magneticvariation. Select Done.Coordinate SystemsSetting the Position Format or the Map Datum Coordinate SystemsYou can set the position format in which a given location reading appears, and the coordinate systemon which the map is structured. The default coordinate system is WGS 84.NOTE: Do not change the position format or the map datum coordinate system unless you are usinga map or chart that specifies a different position format.1. From the Home screen, select Configure > Units.2. Complete an action:Select Position Format to set the position format in which a given location reading appears.Select a position format.Select Map Datum to set the coordinate system on which the map is structured. Select acoordinate system.Configuring the Time1. From the Home screen, select Configure > Units > Time.2. Complete an action:Select Time Format to set a time-keeping standard. Select 12 Hour, 24 Hour, or UTC(universal time coordinate).Select Time Zone > Auto Time Zone to allow the chartplotter to set the time zoneautomatically.Select Time Zone > Custom Time Zone to set the time zone manually. Enter the time zonehour adjustment. Select Done.Units of MeasureYou can set the units of measure the chartplotter shows, using a standardized system ofmeasurements or creating a customized system of measurements.Selecting a Standardized System of Measurement1. From the Home screen, select Configure > Units > System Units.2. Select Statute (mh, ft, ºF), Metric (kh, m, ºC), or Nautical (kt, ft, ºF).•••••••••