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Great-circle navigation. 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. Such routes yield the shortest distance between two points on the globe.
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 between the two points on the surface of the sphere. (By comparison, the shortest path passing through the sphere's interior is the chord between ...
By great-circle distance. Since November 9, 2020, the longest active scheduled passenger flight by great-circle distance is Singapore Airlines Flights 23 and 24 [ 20 ] using an Airbus A350-900ULR between Singapore and New York–JFK at 15,349 kilometres (9,537 mi; 8,288 nmi).
A great circle is the largest circle that can be drawn on any given sphere. Any diameter of any great circle coincides with a diameter of the sphere, and therefore every great circle is concentric with the sphere and shares the same radius. Any other circle of the sphere is called a small circle, and is the intersection of the sphere with a ...
The southernmost flight route with plausible airports would be between Buenos Aires and Perth. [40] With a 175° (S) heading, the route's great circle exceeds 85° S and would be within 500 kilometres (310 mi) of the South Pole. Currently, no commercial airline operates this 12,600-kilometre (7,800 mi; 6,800 nmi) route.
Flight length. In aviation, the flight length or flight distance refers to the distance of a flight. Aircraft do not necessarily follow the great-circle distance, but may opt for a longer route due to weather, traffic, to utilise a jet stream, or to refuel. Commercial flights are often categorized into long-, medium- or short-haul by commercial ...
The great circle route over the North Pole is 13,000 km (7,000 nmi), or 5 + 1 ⁄ 2 hours less flying time at a typical cruising speed. Some old maps in the Mercator projection have grids composed of lines of latitude and longitude but also show rhumb lines which are oriented directly towards north, at a right angle from the north, or at some ...
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 ...