Fromveur Passage

The Fromveur Passage (Passage du Fromveur; Strizh-mor ar Froñveur), sometimes called St. Vincent's Channel, is a strait that lies between the island of Ushant and Kéréon lighthouse on Men Tensel Rock, off the coast of the French province of Brittany. It forms part of the northern limit of the Iroise Sea.

The name Fromveur comes from the Breton words froud, meaning current, and meur meaning great, as the passage can exhibit strong tidal currents, often running at 8 kn. These currents, the second strongest in France after those of the Raz Blanchard in Normandy, make the passage a promising location for tidal power installations. GDF Suez plans to install a 0.5-megawatt test tidal turbine in the passage in 2014.