To circumnavigate a place, such as an island, a continent, or the Earth, is to travel all the way around it by boat or ship. More recently, the term has also been used to cover aerial round-the-world flights.
The route of a typical modern sailing circumnavigation, via the Suez Canal and the Panama Canal is shown in red; its antipodes are shown in yellow.
A basic definition of a world circumnavigation would be a route which covers at least a great circle, and in particular one which passes through at least one pair of points antipodal to each other.[1] In practice, different definitions of world circumnavigation are used, in order to accommodate practical constraints depending on the method of circumnavigation.
Nautical
The map on the right shows, in red, a typical sailing circumnavigation of the world by the trade winds and the Suez and Panama canals; overlaid in yellow are the points antipodal to all points on the route. It can be seen that the route roughly approximates a great circle, and passes through two pairs of antipodal points. This is a route followed by many cruising sailors; the use of the trade winds makes it a relatively easy sail, although it passes through a number of zones of calms or light winds.
The route of a typical yacht racing circumnavigation is shown in red; its antipodes are shown in yellow.
In yacht racing, a round-the-world route approximating a great circle would be quite impractical, particularly in a non-stop race where use of the Panama and Suez Canals would be impossible. Yacht racing therefore defines a world circumnavigation to be a passage of at least 21,600 nautical miles (40,000 km) in length which crosses the equator, crosses every meridian in the same direction and finishes in the same port as it starts.[2] The map on the left shows the route of the Vendée Globe round-the-world race in red; overlaid in yellow are the points antipodal to all points on the route. It can be seen that the route does not pass through any pairs of antipodal points. Since the winds in the lower latitudes predominantly blow west-to-east it can be seen that there is an easier route (west-to-east) and a harder route (east-to-west) when circumnavigating by sail; this difficulty is magnified for square-rig vessels..
Since the advent of world cruises in 1922, by Cunard'sLanconia, thousands of people have completed circumnavigations of the globe at a more leisurely pace. Typically, these voyages begin in New York City or Southampton, and proceed westward. Routes vary, either travelling through the Caribbean and then into the Pacific Ocean via the Panama Canal, or around Cape Horn. From there ships usually make their way to Hawaii, the islands of the South Pacific, Australia, New Zealand, then northward to Hong Kong, South East Asia, and India. At that point, again, routes may vary: one way is through the Suez Canal and into the Mediterranean; the other is around the Cape of Good Hope and then up the west coast of Africa. These cruises end in the port where they began.
Aviation
Aviation records take account of the wind circulation patterns of the world; in particular the jet streams, which circulate in the northern and southern hemispheres without crossing the equator. There is therefore no requirement to cross the equator, or to pass through two antipodal points, in the course of setting a round-the-world aviation record. Thus, for example, Steve Fosset's global circumnavigation by balloon was entirely contained within the southern hemisphere.
For powered aviation, the course of a round-the-world record must start and finish at the same point and cross all meridians; the course must be at least 36,787.559 kilometres (22,858.729 mi) long (which is the length of the Tropic of Cancer). The course must include set control points at latitudes outside the Arctic and Antarctic circles.[3]
In ballooning, which is totally at the mercy of the winds, the requirements are even more relaxed. The course must cross all meridians, and must include a set of checkpoints which are all outside of two circles, chosen by the pilot, having radii of 3,335.85 kilometres (2,072.80 mi) and enclosing the poles (though not necessarily centred on them).[4]
Surface Travel
There is one successful polar circumnavigation journey; tracing a great circle around the globe 'vertically' i.e. through both poles. Sir Ranulph Fiennes, Charles Burton and their team successfully completed the Transglobe Expedition between 1979 and 1982. Transglobe was the first polar circumnavigation by surface travel, touching two true antipodes: the two poles of the earth. They approximated the great circle passing through Greenwich, covering 52,000 miles in the process. "To the Ends of the Earth" is the classic book which describes this journey.
Human Powered
To date no one has completed a human powered circumnavigation according to the guidelines set by Guinness World Records.[5] However, in 2006, Colin Angus and Julie Wafaei completed a circumnavigation of the northern hemisphere entirely by human power, although Julie was with him for only part of the trip as she finished what Tim Harvey had started[6]. Although Angus did not cross the equator, the National Geographic recognized this as the first human powered circumnavigation [7], but Guinness did not.
According to his Expedition 360 website, Jason Lewis is on track to complete the first antipodal circumnavigation by human power, but since his trip has involved non human powered travel between legs it still does not qualify under the Guiness rules as human powered circumnavigation.[8]
Notable global maritime circumnavigations
Ferdinand Magellan, 1511–1521 (multiple voyages). In 1511 he visited the Moluccas (3°9′S 129°23′E). He returned to Portugal and set out in 1519 to circumnavigate the globe. He discovered and sailed through the Strait of Magellan and reached the Philippines in 1521, where he was killed on Cebu (10°5′S 123°33′E).
Enrique of Malacca, ?–1521, Magellan's interpreter (multiple voyages). He was captured in Sumatra as a child and taken to the Moluccas where he was sold to Magellan in 1511; he accompanied Magellan on his circumnavigation and ended up on Cebu in the Philippines.
The 18 survivors of Ferdinand Magellan's expedition (which began with 5 ships and 200 men), 1519–1522, in the Victoria. After Magellan died in the Philippines in 1521, the circumnavigation was completed under the command of the Basque seafarer Juan Sebastián Elcano who returned to Seville on September 8, 1522 after a journey of 3 years and 1 month.[9] . They were the first to circumnavigate the globe in a single expedition.
The survivors of García Jofre de Loaysa's Spanish expedition, 1525–1536. None of Loaysa's seven ships completed the voyage, but Santa María de la Victoria reached the Moluccas before being wrecked in a Portuguese attack. Fernando de la Torre and eight survivors return to Spain on a Portuguese ship.
Andrés de Urdaneta, another Basque, completed a nine-year journey circumnavigating the globe in 1528.[10]
Tobias Furneaux, 1772–1774, in HMS Adventure. The first circumnavigation from west to east. (Furneaux was a veteran of Byron's expedition so he was also the first person to circumnavigate in both directions.)
Teddy Seymour, 1987, the first African-American to complete solo single-handed circumnavigation, aboard sailboat Love Song.
Tania Aebi, 1985–1987, American woman who completed a solo circumnavigation by the age of 20, one 80 nautical mile stretch with crew disqualified her from an official record.
Kay Cottee, 1988, first woman to perform a solo non-stop circumnavigation.
Jesse Martin, 1999, youngest person (aged 17-18 years) to perform a solo non-stop circumnavigation.
Adrienne Cahalan, 2004 first and only woman to break the fastest time for a circumnavigation, 58 days, 9 hours, 32 minutes, 45 seconds, as navigator aboard 125 ft maxi catamaran Cheyenne, skippered by Steve Fosset.
Dee Caffari, 2006, first woman to perform a solo westabout non-stop circumnavigation, in 178 days.[11]
Bruno Peyron, 2005, set current windpowered circumnavigation record, 50 days, 16 hours, 20 minutes, aboard maxi catamaran Orange II.
LZ-127 Graf Zeppelin, 1929, piloted by Hugo Eckener set a record for the fastest aerial circumnavigation, 21 days, which was also the first circumnavigation in an airship.
On July 1, 1931, pilot Wiley Post and navigator Harold Gatty completed their circumnavigation of the world in a Lockheed Vega aeroplane, Winnie Mae, in 8 days, 15 hours and 51 minutes; the record for fastest circumnavigation was once again held by an aeroplane.
In 1932Wolfgang von Gronau flew around the World with a twin engine Dornier seaplane, Gronland-Wal D-2053, in nearly four months, making 44 stops en route. He was accompanied by co-pilot Gerth von Roth, mechanic Franzl Hack, and radio operator Frtiz Albrecht.[12]
In 1933Wiley Post repeated his circumnavigation by aeroplane, but this time solo, using an autopilot and radio direction finder. He made the first solo aerial circumnavigation in a time one day faster than his previous record: 7 days, 19 hours, 49 minutes, in which he covered 25,110 kilometres (15,596 mi).
Steve Fossett, 3 March, 2005, first non-stop, non-refueled solo circumnavigation in an airplane, 67 hours, covering 37,000 kilometres.
Steve Fossett, 11 February, 2006, longest non-stop, non-refueled solo flight (with circumnavigation) in an airplane, covering 42,469.5 kilometres (26,389.3 mi), in 76 hours and 45 minutes.[13][14]
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