June 17 2015 Volvo Ocean Race Leg 9 Lorient to Gothenburg via The Hague.
Boats close to Ile de Sein, NW Brittany France
Rick Tomlinson/Volvo Ocean Race
http://www.volvooceanrace.com
The area is notorious for its range of tidal fall and flow. Boats either hug the coast to minimise the tidal impact, or head into a favourable tide to add up to six knots or more to their boat speed over the ground.
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