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The December 2006 guidelines issued by Guinness state that a human powered circumnavigation must travel a minimum of 36,787.559 km (the distance of the Tropic of Cancer), cross the Equator, and each leg must commence at the exact point where the last finished off. There are no requirements to reach antipodal points. To date no one has completed a human-powered circumnavigation according to the guidelines set by ].<ref></ref> However, in 2006, ] and Julie Wafaei completed a circumnavigation through 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.<ref>], ''Beyond the Horizon: The Great Race to Finish the First Human-Powered Circumnavigation of the Planet''; Toronto: Doubleday Canada, 2007</ref> Although Angus did not cross the equator, '']'' Magazine honored Angus' achievement in human-powered circumnavigation,<ref></ref> The December 2006 guidelines issued by Guinness state that a human powered circumnavigation must travel a minimum of 36,787.559 km (the distance of the Tropic of Cancer), cross the Equator, and each leg must commence at the exact point where the last finished off. There are no requirements to reach antipodal points. To date no one has completed a human-powered circumnavigation according to the guidelines set by ].<ref></ref> However, in 2006, ] and Julie Wafaei completed a circumnavigation through 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.<ref>], ''Beyond the Horizon: The Great Race to Finish the First Human-Powered Circumnavigation of the Planet''; Toronto: Doubleday Canada, 2007</ref> Although Angus did not cross the equator, '']'' Magazine honored Angus' achievement in human-powered circumnavigation,<ref></ref>


] (of ]) completed a human powered journey around the world on 6 October 2007 becoming the first Briton to do so. He used a pedal boat to cross the Atlantic and Pacific Oceans and cycled, and rollerbladed across North America, Australia, Eurasia and Africa. His journey, however, does not conform to the Guinness guidelines because he completed legs out of order and did not use exclusively his own power (Outside Magazine, Oct.2007). Lewis's expedition did cross the equator and reach antipodal points.<ref></ref>


== Notable global maritime circumnavigations == == Notable global maritime circumnavigations ==

Revision as of 06:23, 7 October 2007

"Round the world" redirects here. For the airline ticket, see Round-the-world ticket.

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.

World circumnavigation

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. 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. 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's Lanconia, 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 Fossett'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.

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).

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 (84,000 km) in the process. "To the Ends of the Earth" is the classic book which describes this journey.

Human-powered

Thomas Stevens was the first person to circle the globe by bicycle. The feat was accomplished between 1884 and 1886. While impressive at the time, a good portion of the trip was by steamer due to technical and political reasons.

The December 2006 guidelines issued by Guinness state that a human powered circumnavigation must travel a minimum of 36,787.559 km (the distance of the Tropic of Cancer), cross the Equator, and each leg must commence at the exact point where the last finished off. There are no requirements to reach antipodal points. To date no one has completed a human-powered circumnavigation according to the guidelines set by Guinness World Records. However, in 2006, Colin Angus and Julie Wafaei completed a circumnavigation through 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. Although Angus did not cross the equator, National Geographic Adventure Magazine honored Angus' achievement in human-powered circumnavigation,


Notable global maritime circumnavigations

Other notable maritime circumnavigations

Record maritime circumnavigations

  • Bruno Peyron (French), January–March 2005, fastest circumnavigation 50 days 16 hours 20 minutes 4 seconds.
  • Jean Luc van den Heede (French), 2004, fastest westward single-handed circumnavigation, 122 days 14 hours 3 minutes 49 seconds.
  • Adrienne Cahalan (Australian), February-March 2004, fastest woman to complete a circumnavigation (crew of "Cheyenne") 58 days 9 hours 32 minutes 45 seconds
  • Ellen MacArthur (English), 2004–2005, fastest single-handed 71 days 14 hours 18 minutes 33 seconds.
  • Jon Sanders holds the world record for completing a single-handed triple circumnavigation.
  • The RMS Queen Mary 2, at 148,528 gross tons, became the world's largest passenger ship to circumnavigate the globe during her 2007 world cruise.

Notable aerial circumnavigations

Fictional circumnavigations

The most famous circumnavigation never happened. This is the story told in Jules Verne's 1872 adventure novel, Around the World in Eighty Days. Upper class Englishman Phileas Fogg and his servant Passepartout use a variety of transportation means and ingenuity to accomplish the adventurous feat. The book was freely adapted by Mike Todd into an Academy Award winning movie of the same name in 1956, starring David Niven and Cantinflas. The book (especially) and the movie are tributes to the new transportation possibilities of the early Industrial Revolution, with the coming of steamships, railways, etc. As this circumnavigation did not cross the Equator or reach antipodal points, it would not have been recognized by Guinness Records as an official circumnavigation (if such a thing had existed at that time).

External links

Template:Nautical portal

References

  1. Definition of a Circumnavigation
  2. World Sailing Speed Record Council Rules 2005-2008, sec. 26, Record Courses
  3. FAI Sporting Code Section 2: Powered Aerodynes: Speed around the world non-stop and non-refuelled
  4. FAI Sporting Code Section 1: Aerostats: Around-the-World Records
  5. About Circumnavigations
  6. Colin Angus, Beyond the Horizon: The Great Race to Finish the First Human-Powered Circumnavigation of the Planet; Toronto: Doubleday Canada, 2007
  7. Human-Powered Circumnavigation
  8. Kurlansky, Mark. 1999. The Basque History of the World. Walker & Company, New York. ISBN 0-8027-1349-1, p. 63
  9. wrong-way sailor back on UK soil, BBC News. Retrieved May 21, 2006.
  10. Round-the-World Flights, from WingNet. Retrieved May 14, 2006.
  11. Fossett flies to non-stop record, from BBC News. Retrieved 11 February, 2006.
  12. Steve lands as an uninvited guest!, from Virgin Global Flyer. Retrieved 11 February, 2006.
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