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Summary
This image shows the route, in red, of a typical sailingcircumnavigation of the world via the Panama Canal and Suez Canal, making use of the trade winds. Shown in yellow is the antipodean point of each point on the route; it can be seen that a boat following this route will pass through several points antipodean to each other, thus satisfying one definition of a circumnavigation.
This image is in the public domain because it is a screenshot from NASA’s globe software World Wind using a public domain layer, such as Blue Marble, MODIS, Landsat, SRTM, USGS or GLOBE.