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Gåsøy Lighthouse

Iso White/Red/Green 6s🇳🇴Bærum, NOOperational

Location & Light Range

About Gåsøy Lighthouse

Also known as: Gåsøy (Arnesflua)

Gåsøy Lighthouse, a 7-meter hexagonal tower, stands on a concrete pier off the south coast of Gåsøy island in Norway's northern Oslofjord. Constructed from concrete and fiberglass, this red tower houses a light with an isophase white, red, and green characteristic that cycles every 6 seconds. The original structure, a lantern on a tripod, was replaced by the current facility. The lighthouse has a geographic range of 9.3 nautical miles. While the site is accessible by boat, the tower itself is closed to the public. Steilene is the nearest port, located 2.1 kilometers away.

Why it matters: This lighthouse is essential for safe passage through the intricate channels of the northern Oslofjord, particularly around Gåsøy island.

Light & Optic

Characteristic Signature
Iso White/Red/Green 6s
Flash Type
Isophase
Light Color
White/Red/Green
Interval
6s
Raw Code
Iso WRG 6s
Focal Height
7m
Geographic Range
9.3NM

Construction & History

Significant events: Original structure replaced

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7m
Tower Shape
hexagonal
Tower Color
red
Material
concrete, fiberglass

Structure: hexagonal fiberglass tower mounted on a small concrete pier

Location

City
Bærum
Country
🇳🇴Norway
Region
Akershus
Sea Region
northern Oslofjord, off the south coast of Gåsøy island
Latitude
59.8514°
Longitude
10.5888°

References & Identifiers

Nearest Port
Steilene(2.1 km)
Admiralty No.
B2398
NGA No.
0456
ARLHS No.
NOR-300
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Frequently Asked Questions

How do mariners identify Gåsøy Lighthouse at night?+
Gåsøy displays the characteristic Iso White/Red/Green 6s. 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 Gåsøy Lighthouse guide vessels into?+
Gåsøy Lighthouse assists vessels approaching 5 nearby ports. The closest is Snarøya at 2.1 NM to the NNE. Other ports served include Steilene (2.1 NM SSE), Lysaker (3.9 NM NNE), Bjørkås (4.9 NM SSW), Slemmestad (4.9 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Gåsøy Lighthouse still active and maintained?+
Yes, Gåsøy 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 Gåsøy Lighthouse?+
Gåsøy Lighthouse is located within the Baltic Sea trade route — a vital shipping corridor for trade between Scandinavian, German, Polish, and Baltic state ports. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Gåsøy Lighthouse?+
You can track vessels near Gåsøy 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.