Altimeter : An instrument for measuring altitude
Barometer : An instrument for determining the pressure of the atmosphere and assist in forecasting weather. To convert Mililbars to Mercury in Inches please go to: www.pcwp.com
Bearing : A direction in degrees from where you are to where you want to go/ horizontal angle measured from north to your direction of travel
Cardinal Points : The primary directions- North, East, South and West
Declination : Difference in degrees or angle between true north and magnetic north.
To locate declination angle, visit the following sites:
To locate a declination in the United States: www.ngdc.noaa.gov
1. Enter your zip code in the area provided
2. Click "Get Location"
3. Scroll down and click "Compute"
To locate a declination in Canada:
http://www.gsc.nrcan.gc.ca/geomag/field/mdcalc_e.php
Elevation : For a topographic map of your area go to:
nmviewogc.cr.usgs.gov
Magnetic Needle : Compass needle which points at magnetic north
True North : The North Pole/ Geographic North
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