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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. Such routes yield the shortest distance between two points on the globe. [1]
The Great Loop is a system of waterways that encompasses the eastern portion of the United States and part of Canada. It is made up of both natural and man-made waterways, including the Atlantic and Gulf Intracoastal Waterways , the Great Lakes , the Erie Canal , and the Mississippi and Tennessee-Tombigbee Waterway . [ 1 ]
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 Crimson Route was a planned Great Circle route to ferry aircraft from manufacturing plants in Southern California and Seattle via Montana over Canada to Greenland using Arctic air routes. This route had the advantage of avoiding the poor weather over the North Atlantic by flying over the high latitudes of northern Canada to Greenland, then ...
Pilots use aeronautical charts based on LCC because a straight line drawn on a Lambert conformal conic projection approximates a great-circle route between endpoints for typical flight distances. The US systems of VFR ( visual flight rules ) sectional charts and terminal area charts are drafted on the LCC with standard parallels at 33°N and 45°N.
The haversine formula determines the great-circle distance between two points on a sphere given their longitudes and latitudes.Important in navigation, it is a special case of a more general formula in spherical trigonometry, the law of haversines, that relates the sides and angles of spherical triangles.
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.
Geographical distance or geodetic distance is the distance measured along the surface of the Earth, or the shortest arch length. The formulae in this article calculate distances between points which are defined by geographical coordinates in terms of latitude and longitude. This distance is an element in solving the second (inverse) geodetic ...
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