Great Circle Calculation

Departure position (latitude, longitude) + Arrival position (latitude, longitude)
Longitude Interval (optional), Maximum Latitude (optional)
to compute
Great Circle

Departure latitude    °  ' . N  S
         

Departure longitude °  ' .   W  E
         

Arrival latitude    °  ' . N  S
         

Arrival longitude °  ' .   W  E
         

Longitude interval °  0'
       

Maximum latitude    °  ' 
      
 
      



Distance

nautical mile(s)

The GC distance is X nautical miles as the sum of the rhumb lines (RLs).

Vertex
Latitude   

Longitude

The Vertex is on/outside the track.
The Vertex distance is X nautical miles.


Courses (GC)

Great Circle Theoretical Departure Course   
Great Circle Theoretical Arrival Course        

The period of the geodetic curve is X°

Composite Sailing

No/The maximum latitude is reached.
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The total distance indicated above is the distance with composite sailing.

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with reference ellipsoid Airy 1830 - 1/299.324975315032 Australian Nat. 1965 - 1/298.249997276159 Bessel 1841 - 1/299.152813106079 Clarke 1866 - 1/294.978698213901 Clarke 1880 - 1/293.465000003029 Everest 1830 - 1/300.801699438499 GRS 1980 - 1/298.257222096042 Hough - 1/297.000000617588 International 1924 - 1/297.000000028402 Krassovsky 1940 - 1/298.300000376016 Mercury 1960 - 1/298.300000821622 Modified Airy - 1/299.324965463531 Modified Everest - 1/300.801700097121 Modified Mercury 1968 - 1/298.300000817750 New International 1967 - 1/298.249615390012 Normal Sphere - 0 Southeast Asia - 1/298.300000240870 WGS 1966 - 1/298.249998149523 WGS 1972 - 1/298.259998589995 WGS 1984 - 1/298.257223560493

Lat/Long accuracy (fraction of minute) 0.1-0.9 0.01-0.99 0.001-0.999 0.0001-0.9999

Course accuracy 000-359 000.0-359.9

Distance accuracy 0.1-0.9 0.01-0.99 0.001-0.999 0.0001-0.9999

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