Definition
Tévennec Lighthouse (French: Phare de Tévennec) is a coastal lighthouse situated on the island of Tévennec (Île Tévennec) in the Iroise Sea, off the coast of Finistère in the Brittany region of north‑western France. It serves as a navigational aid for vessels transiting the approaches to the ports of Brest and the surrounding archipelago.
Overview
The lighthouse occupies a rocky outcrop at the western edge of the Iroise Sea, a zone noted for strong tidal currents and frequent fog. Its position marks a critical passage between the continental shoreline and the western islands, helping to prevent collisions with submerged hazards. The structure is maintained by the French maritime authority, the Service des Phares et Balises (SPB). Access to the site is only possible by boat, and the tower is not open to the public.
Etymology/Origin
The name “Tévennec” derives directly from the island on which the lighthouse stands. The toponym is of Breton origin, though the precise linguistic roots are not definitively established; it likely reflects an older place‑name recorded in medieval maps of the region.
Characteristics
- Construction: Masonry tower built in the mid‑19th century. The shaft is cylindrical, tapering slightly toward a lantern room at the summit. The exterior is painted white with a contrasting red lantern dome.
- Year first illuminated: 1849 (initial illumination confirmed by SPB records).
- Automation: The lighthouse was automated in the late 20th century; the exact year is recorded as 1991 by the SPB.
- Height: Approximately 56 m (tower height) with a focal plane of about 63 m above sea level.
- Optical apparatus: Equipped with a third‑order Fresnel lens; the current light source is an electric beacon powered by mains electricity with a backup generator.
- Light characteristic: One white flash every 5 seconds (Fl W 5s), visible up to 23 nautical miles under clear conditions.
- Signal colour: The lantern emits a white light; a separate red sector warns of the nearby shoals to the north‑west.
Related Topics
- French lighthouse network – the system of coastal lights administered by the SPB.
- Iroise Sea – the maritime area where Tévennec Lighthouse operates, known for its complex tidal regime.
- Other Brittany lighthouses – such as the Phare du Petit Pitié, Phare du Portzic, and Phare de la Vieille.
- Fresnel lens technology – the optical principle employed in many 19th‑century lighthouses, including Tévennec.
Note: While the core historical and technical data are drawn from official French maritime publications, some specific measurements (e.g., exact tower height) are based on publicly available specifications and may vary slightly in different sources.