Great Circle Distance means the shortest distance, rounded to the nearest kilometre, between the origin and the destination aerodromes, measured over the earth’s surface modelled according to the World Geodetic System 1984 (WGS84);
Great Circle Distance means the shortest distance between two points along the surface of a sphere (as opposed to a straight line through the sphere’s interior). Great circles are circles on a sphere whose centres coincide with the centre of the sphere.
Great Circle Distance means the shortest distance between any two points on the surface of a sphere measured along a path on the surface of the sphere.