Summarium

This image shows the route, in red, of a typical round-the-world yacht race via the great capes, by way of the roaring forties. Shown in yellow is the antipodean point of each point on the route; it can be seen that a boat following this route will not pass through any pair of antipodal points. Since doing so in the context of a race — particularly a non-stop race — would be impractical, yacht racing uses a different definition of a circumnavigation.

This image was constructed from a public domain Visible Earth product of the Earth Observatory office of the United States government space agency NASA. It is based on a cylindrical equi-distant projection.

Potestas usoris

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