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Lost-Moan Lighthouse

Fl (3) White/Red/Green 12s🇫🇷FROperational

Location & Light Range

About Lost-Moan Lighthouse

A cylindrical concrete tower, painted red and standing 12.5 meters tall, marks the east end of a reef 800 meters south of Guilvenec's entrance. The lighthouse has a focal height of 8 meters and emits three flashes of white, red, or green light every 12 seconds. Its geographic range is 9.7 nautical miles. The site is open to visitors, but the tower itself is closed. This aid to navigation is located nearest to the port of Guilvenec, 0.5 kilometers away.

Why it matters: This lighthouse is indispensable for safe passage into Guilvenec, warning mariners away from the barely-submerged reef near the harbor entrance. Its directional light provides precise guidance through safe channels.

Light & Optic

Characteristic Signature
Fl (3) White/Red/Green 12s
Flash Type
Flashing
Light Color
White/Red/Green
Flash Count
3 flashes
Interval
12s
Raw Code
Fl(3) W R G 12s
Focal Height
8m
Geographic Range
9.7NM

Location

Country
🇫🇷France
Sea Region
Located at the east end of a barely-submerged reef about 800 m south of the entrance to Guilvenec.
Latitude
47.7836°
Longitude
-4.2794°

References & Identifiers

Nearest Port
Guilvinec(0.5 km)
ARLHS No.
FRA-591

Tower & Structure

Tower Height
12.5m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round concrete tower with gallery, painted red

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Lost-Moan Lighthouse at night?+
Lost-Moan displays the characteristic Fl (3) White/Red/Green 12s — 3 white/red/green 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 white/red/green color may indicate a specific sector or warning zone.
Which ports and harbors does Lost-Moan Lighthouse guide vessels into?+
Lost-Moan Lighthouse assists vessels approaching 5 nearby ports. The closest is GUILVINEC at 0.6 NM to the N. Other ports served include Lesconil (2.8 NM ENE), Penmarc'H Point (3.7 NM WNW), LARVOR (4.1 NM ENE), Loctudy (5.3 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Lost-Moan Lighthouse still active and maintained?+
Yes, Lost-Moan 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.
How can I track vessels near Lost-Moan Lighthouse?+
You can track vessels near Lost-Moan 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.