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Nordre Kaholmen Lighthouse

Oc White/Red/Green 6s🇳🇴Frogn, NOOperational

Location & Light Range

About Nordre Kaholmen Lighthouse

Established in 1897, Nordre Kaholmen Lighthouse is situated on a large rock marking Kaholmen island, approximately 1 km northwest of Drøbak in the Oslofjord. The lighthouse consists of a 3-meter octagonal lantern, painted white with a red roof, which stands 9.5 meters above sea level. It emits an occulting white, red, or green light that cycles every 6 seconds, with the color changing to indicate direction. This light has an operational range of 10.2 nautical miles. While the lantern room is not open to the public, the site can be reached by boat.

Why it matters: This light is essential for vessels navigating the Oslofjord, offering precise guidance as ships approach or depart the historic town of Drøbak. Its directional color system aids in safely avoiding shallow areas around Kaholmen island.

Light & Optic

Characteristic Signature
Oc White/Red/Green 6s
Flash Type
Occulting
Light Color
White/Red/Green
Interval
6s
Raw Code
Oc WRG 6s
Focal Height
9.5m
Geographic Range
10.2NM

Construction & History

First Lit
1897

References & Identifiers

Nearest Port
Drobak(1.2 km)
Admiralty No.
B2364
NGA No.
0396

Tower & Structure

Tower Height
3m
Tower Shape
octagonal
Tower Color
white with a red roof

Structure: A 3m octagonal lantern, painted white with a red roof, mounted on a large rock.

Location

City
Frogn
Country
🇳🇴Norway
Region
Akershus
Sea Region
Oslofjord, marking Kaholmen island, about 1 km northwest of Drøbak.
Latitude
59.6786°
Longitude
10.6087°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Nordre Kaholmen Lighthouse at night?+
Nordre Kaholmen displays the characteristic Oc 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 Nordre Kaholmen Lighthouse guide vessels into?+
Nordre Kaholmen Lighthouse assists vessels approaching 5 nearby ports. The closest is Drøbak at 1.2 NM to the SSE. Other ports served include Engene (2.1 NM W), HVITSTEN (5 NM SSE), Halvorshavn (5.7 NM S), GRAFFSTRANDA (6.2 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Nordre Kaholmen Lighthouse still active and maintained?+
Yes, Nordre Kaholmen 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 Nordre Kaholmen Lighthouse?+
Nordre Kaholmen 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 Nordre Kaholmen Lighthouse?+
You can track vessels near Nordre Kaholmen 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.