OnboardIntelligence.com
Home
Celestial Navigation
Rhumb Line/Great Circle
Contact
Rhumb Line Calculation
Departure position (latitude, longitude) + Arrival position (latitude, longitude)
to compute
Course and Distance
Departure latitude
°
' .
N
S
Departure longitude
°
' .
W
E
Arrival latitude
°
' .
N
S
Arrival longitude
°
' .
W
E
Course
Distance
nautical mile(s)
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