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post #64 of Old 01-12-2014
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Re: 76-year-old begins solo circumnavigation

Originally Posted by benesailor View Post
I was under the impression that a true circum-navigation was the distance around the equator; therefore, this is why they start in the northern hemisphere to meet the distance requirement. Is this right??
No. The problem rose many years ago in what regards ratification of records since some tried to circumnavigate only around high latitudes on the Southern ocean, kind of a tour around the South Pole. For that reason it was established that at some point they have to cross the equator and the course has to have a minimum length of 21,600 nm to validate the record.

the rules:

"According to the WSSRC, for around the world sailing records, there is a rule saying that the length must be at least 21,600 nm calculated along the shortest possible track from the starting port and back that does not cross land and does not go below 63S. The great-circle distance formulas are to be used, assuming that the great circle length is 21,600 nm. It is allowed to have one single waypoint to lengthen the calculated track. The equator must be crossed. In reality, this means that the boat should pass a waypoint at or not far from the antipode of the starting port of the journey (the exact position depends on how short the shortest possible track is). For example, the Vende Globe starts at 46N 2W, has a waypoint at 57S 180E, and barely makes the distance requirement."




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