67GPSmap 76CSHeading SetupThe Heading Setup Page allows you to specify the type of headingdisplay and the type of North Reference used to calculate your heading.Unless you have a working knowledge of Headings and North Referenc-ing, it is recommended that you use the default values.To use the Heading Setup feature:1. Access the Heading Setup Page.2. Highlight the Display fi eld, press ENTER and select from Cardi-nal Letters, Degrees or Mils to display the heading value.3. Highlight the North Reference fi eld, press ENTER and selectfrom True North, Magnetic North, Grid North, or User Grid North.4. Select speed and time delay for electronic compass switching.See page 15.Calibration SetupThe Calibration Setup Page allows you to calibrate both the Compassand Altimeter for increased accuracy in navigation.To calibrate the Compass:1. Access the Calibration Setup Page which displays a “Whichsensor would you like to calibrate?” message.2. Highlight the Compass button and press ENTER to display theCompass Calibration Page. Follow instructions on page 16.To calibrate the Altimeter:1. Select Altimeter and press ENTER to display the AltimeterCalibration Page and follow instructions on pages 25 and 68.Calibration SetupGPS NavigationHeading SetupDisplayOptionsNorthReferenceOptionsTime DelayOptions