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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.
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