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La Roche Mengant Lighthouse

Fl (3) Red 12s🇫🇷FROperational

Location & Light Range

About La Roche Mengant Lighthouse

Completed in 1898, La Roche Mengant is a cylindrical stone tower standing 15 meters tall. It is painted black with a single red horizontal band. The structure features two galleries but does not have a lantern, with its light originating directly from the tower. Its focal height is 11 meters, and it emits a red flash every 12 seconds, with a geographic range of 10.7 nautical miles. This lighthouse is situated on an isolated rock in the Goulet de Brest, approximately 3.5 kilometers from Camaret-sur-Mer.

Why it matters: This lighthouse is essential for safe navigation through the Goulet de Brest, a busy strait leading to the port of Brest. Its unique lighting characteristic provides important sector guidance, warning mariners of the rock it marks and directing them through the safest channels.

Light & Optic

Characteristic Signature
Fl (3) Red 12s
Flash Type
Flashing
Light Color
Red
Flash Count
3 flashes
Interval
12s
Raw Code
Fl R 12s
Focal Height
11m
Geographic Range
10.7NM

Construction & History

Year Built
1898

References & Identifiers

Nearest Port
Camaret-sur-Mer(3.5 km)
ARLHS No.
FRA-454

Tower & Structure

Tower Height
15m
Tower Shape
cylindrical
Tower Color
black with one red horizontal band
Material
stone

Structure: round cylindrical stone tower with two galleries but no lantern, painted black with one red horizontal band

Location

Country
🇫🇷France
Sea Region
an isolated rock in the middle of Goulet de Brest
Latitude
48.3390°
Longitude
-4.5757°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify La Roche Mengant Lighthouse at night?+
La Roche Mengant displays the characteristic Fl (3) Red 12s — 3 red flashes every 12 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The red color may indicate a specific sector or warning zone.
Which ports and harbors does La Roche Mengant Lighthouse guide vessels into?+
La Roche Mengant Lighthouse assists vessels approaching 5 nearby ports. The closest is Camaret-sur-Mer at 3.5 NM to the S. Other ports served include Le Fret (4.1 NM SE), Brest (4.2 NM ENE), PLOUGONVELIN (4.9 NM W), Le Conquet (7.8 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is La Roche Mengant Lighthouse still active and maintained?+
Yes, La Roche Mengant Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
What shipping routes pass near La Roche Mengant Lighthouse?+
La Roche Mengant Lighthouse is located within the English Channel / North Sea corridor — one of the world's busiest maritime corridors connecting the Atlantic to Northern European ports. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near La Roche Mengant Lighthouse?+
You can track vessels near La Roche Mengant Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.