To compute true (i.e. non-magnetic) course and distance between points, enter lat/lon of departure and arrival, select distance units and click "calculate".
Notes:Lat/lon may be entered as:DD.DD (degrees and decimals of a degree)
DD:MM.MM (degrees, minutes and decimals of a minute) or
DD:MM:SS.SS (degrees, minutes, seconds and decimals of a second.)Calculations become inaccurate very close to the earth's poles due to rounding errors.
"Reciprocal" equals course at arrival plus/minus 180º.