initial great-circle course

initial great-circle course

[i′nish·əl ′grāt ‚sər·kəl ‚kȯrs]
(navigation)
The direction, at the point of departure, of the great circle through that point and the destination, expressed as the angular distance from a reference direction, usually north, to that part of the great circle extending toward the destination. Also known as initial great-circle direction.
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