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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]
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.
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 Free Application for Federal Student Aid (FAFSA) is a form completed by current and prospective college students (undergraduate and graduate) in the United States to determine their eligibility for student financial aid.
A useful application for this type of projection is a polar projection which shows all meridians (lines of longitude) as straight, with distances from the pole represented correctly. The flag of the United Nations contains an example of a polar azimuthal equidistant projection.
The disk bounded by a great circle is called a great disk: it is the intersection of a ball and a plane passing through its center. In higher dimensions, the great circles on the n-sphere are the intersection of the n-sphere with 2-planes that pass through the origin in the Euclidean space R n + 1. Half of a great circle may be called a great ...
There are a number of free calculators on the Web to help applicants estimate the EFC before filing the FAFSA. Recipients of need-based financial aid must reapply for each year by completing a new FAFSA. The term and concept of Expected Family Contribution was replaced by the term Student Aid Index (SAI) in 2024. [2]
Numbered routes of South Africa National routes in South Africa are a class of trunk roads and freeways which connect major cities. They form the highest category in the South African route numbering scheme , and are designated with route numbers beginning with "N", from N1 to N18.