Vendée Globe

A few explanations about the Vendée Globe round the world passage.  The rules of the Vendée Globe stipulate that the competitors must sail around the world without stopovers and without any external help. If we look at the globe, there are three ways to sail around the world.

 

The course

1/ By rounding the North Pole, via the Northwest or Northeast Passage.
Two major drawbacks:
The ice, as these routes still have a lot of ice, requiring in most cases the use of an ice-breaker to open them up.
If you set sail from Les Sables d’Olonne, latitude 47° north, sailing around the North pole does not represent a circumnavigation: the distance is shorter than a circumnavigation via the equator of 40,000 km (24,000 miles).  

2/ By sailing through the Panama and Suez Canal.
This implies that the competitor must make a stopover and benefit from some external help.  

3/ By sailing down the North Atlantic, then the South Atlantic, turning left to pass the Cape of Good Hope, then circling Antarctica, via the Indian and Pacific Ocean, before climbing back up the Atlantic Ocean via Cape Horn, in the direction of the prevailing winds.   This is the route for the Vendée Globe.
It is possible to sail in the opposite direction beginning with Cape Horn, but the boats would then be racing into contrary prevailing headwinds.

Important information:
The circumnavigation via the Equator or by the Poles (Great Circle Arc) represents 40,000 km. Or 24,000 miles. The Vendée Globe course represents a little over 24,000 miles.  

Gates
The course has 8 gates.
The Atlantic, Kerguelen, Heard Island,  New Zealand, Western Pacific, Eastern Pacific Gates are defined, so that the competitors cannot go too far south, where the risks of collision with drifting ice are higher.  

The Western Australia and Eastern Australia Gates are defined so that the competitors do not sail further than 1000 miles from the southern coast of Australia. This is to allow the Australian rescue services to be able to use planes to spot any sailors in distress by not being more than one hour away. Any reconnaissance mission would be compromised if the skipper was more than 1000 miles away.

Possible changes to the position of the Gates
If there is any additional risk for the competitors (drifting ice or other risks) the race Directors may modify the position of one or more of the Gates in latitude and longitude.  They will inform the competitors one gate ahead.

Passing through the Gates
A gate is a set of points at the same latitude limited to the west and east by different points of longitude.  For example, the Atlantic Gate: all the points are at 42° south.  The extremities are at 01°00 East and 11°00 East.
A Gate represents a segment of 445 miles, or around a day and a half of sailing for a competitor.

Each competitor must leave at least one of the points at each gate to starboard, (thus sailing to the north of one of the points in this segment).    

The length of the course
It is calculated as follows:

Start from Les Sables d’Olonne.
Equator at 25° West (the most common crossing point in round the world passages).  
Middle of Gate 1 to starboard
Middle of Gate 2 to starboard
Middle of Gate 3 to starboard
Middle of Gate 4 to starboard
Middle of Gate 5 to starboard
Middle of Gate 6 to starboard
Middle of Gate 7 to starboard
Middle of Gate 8 to starboard
Cape Horn to port
Finish in Les Sables d’Olonne

The theoretical course
It represents 24,275 miles.

It is used to calculate the daily rankings at 04H00, 10H00, 15H00 and 19H00 UTC, which are calculated according to the distance left to the finishing line, for each boat in each rankings.

 

Infos précédentes :