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Løgstør Grunde Forfyr Lighthouse

Iso Red/Green 4s🇩🇰Vesthimmerland Municipality, DKOperational

Location & Light Range

About Løgstør Grunde Forfyr Lighthouse

Built in 1908, the Løgstør Grunde Forfyr stands as a square, white tower measuring 9 meters in height. The structure is characterized by a rectangular building featuring two square lantern houses, positioned at opposite ends. This lighthouse emits an isophase red or green light on a 4-second cycle, with a geographic range of 10 nautical miles. It is located on the south side of the Limfjord along Havnevej in Løgstør. The site is accessible to the public, but the tower itself remains closed.

Why it matters: This navigational aid is essential for guiding eastbound ships through the narrow Aggersund channel, a critical passage in the Limfjord leading to Ålborg. Its distinctive dual-lantern design provides precise directional guidance for safe transit.

Light & Optic

Characteristic Signature
Iso Red/Green 4s
Flash Type
Isophase
Light Color
Red/Green
Interval
4s
Raw Code
Iso R/G 4s
Focal Height
9m
Geographic Range
10NM

Construction & History

Year Built
1908

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
9m
Tower Shape
square
Tower Color
white

Structure: rectangular building with two square lantern houses, one at each end

Location

City
Vesthimmerland Municipality
Country
🇩🇰Denmark
Region
North Denmark Region
Sea Region
south side of the Limfjord on the Havnevej in Løgstør, guiding eastbound ships approaching the narrow Aggersund channel leading to Ålborg
Latitude
56.9692°
Longitude
9.2513°

References & Identifiers

Nearest Port
Logstor(0.1 km)
ARLHS No.
DEN-079
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Frequently Asked Questions

How do mariners identify Løgstør Grunde Forfyr Lighthouse at night?+
Løgstør Grunde Forfyr displays the characteristic Iso Red/Green 4s. 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/green color may indicate a specific sector or warning zone.
Which ports and harbors does Løgstør Grunde Forfyr Lighthouse guide vessels into?+
Løgstør Grunde Forfyr Lighthouse assists vessels approaching 5 nearby ports. The closest is Aggersund at 2.2 NM to the NE. Other ports served include Feggesund (11 NM W), Sundsøre (15.8 NM S), Hvalpsund (16.3 NM S), Nykøbing Mors (16.4 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Løgstør Grunde Forfyr Lighthouse still active and maintained?+
Yes, Løgstør Grunde Forfyr 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 Løgstør Grunde Forfyr Lighthouse?+
You can track vessels near Løgstør Grunde Forfyr 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.