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Great-circle navigation or orthodromic navigation (related to orthodromic course; from Ancient Greek ορθός (orthós) 'right angle' and δρόμος (drómos) 'path') is the practice of navigating a vessel (a ship or aircraft) along a great circle.
With its great-circle distance, it set the record both for world's longest domestic flight as well as the world's longest commercial flight. Air Tahiti Nui began the route on 15 March 2020, departing Faa'a International Airport at 3:14 am local time as flight TN64, flying nonstop to Charles de Gaulle Airport and landing at 6:00 am local time on ...
The shortest distance between two geographical points is the great-circle distance. In the example (right), the aircraft travelling westward from North America to Japan is following a great-circle route extending northward towards the Arctic region. The apparent curve of the route is a result of distortion when plotted onto a conventional map ...
A diagram illustrating great-circle distance (drawn in red) between two points on a sphere, P and Q. Two antipodal points, u and v are also shown. The great-circle distance, orthodromic distance, or spherical distance is the distance between two points on a sphere, measured along the great-circle arc between them. This arc is the shortest path ...
The most common standard flight length measurement is by great-circle distance, a formula that calculates the shortest distance across the curvature of the earth for two airports' ARPs. [5] It is the only measurement that is constant on a given city-pair route and unaffected by operational variances. [ 6 ]
Computes the great circle distance between two points, specified by the latitude and longitude, using the haversine formula. Template parameters [Edit template data] Parameter Description Type Status Latitude 1 lat1 1 Latitude of point 1 in decimal degrees Default 0 Number required Longitude 1 long1 2 Longitude of point 1 in decimal degrees Default 0 Number required Latitude 2 lat2 3 Latitude ...
The term , where is the speed, and is the fuel consumption rate, is called the specific range (= range per unit mass of fuel; S.I. units: m/kg). The specific range can now be determined as though the airplane is in quasi-steady-state flight.
percentage of time: typically 10% (i.e., a 10-hour flight needs enough reserve to fly for another hour) percentage of fuel: typically 5% (i.e., a flight requiring 20,000 kg of fuel needs a reserve of 1,000 kg) Except for some US domestic flights, a flight plan normally has an alternate airport as well as a destination airport.