Garmin GPS 72H Owner's Manual

Also see for GPS 72H: Quick start manual Safety and product information Quick start manual

Garmin GPS 72H Owner's Manual Manual pdf 33 page image

GPS 72H Owner’s Manual 27Settings100 datums available. Only changethe Map Datum if you are using achart or a paper map that specifies adifferent datum in the legend.NOTICE: Selecting thewrong map datum can resultin substantial position errors.When in doubt, use the defaultWGS 84 datum for best overallperformance.North Reference—select thereference used in calculating headinginformation.Auto—provides magnetic northheading references which areautomatically determined fromyour current location.True—provides headings basedupon a true north reference.Grid—provides headings basedon a grid north reference.User—allows you to specify the••••magnetic variation at your currentlocation, and provides magneticnorth heading references basedon the value you entered.NOTE: If User is selected, you mustperiodically update the magneticvariation at your present position.NOTICE: Failure to update thissetting may result in substantialdifferences between theinformation displayed on yourGPS 72H and external references,such as a magnetic compass.Magnetic Variation—displays themagnetic variation at your currentlocation. When you select User forthe North Reference setting, thisfield is used to enter the magneticvariance.