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Knerten Lighthouse

Oc (3) White/Red/Green 12s🇳🇴Leka, NOOperational

Location & Light Range

About Knerten Lighthouse

Knerten lighthouse is a 6-meter-tall square tower constructed from fiberglass, topped with a lantern and gallery. It stands on a skerry at the eastern entrance to the Frøviksund, a passage between Madsøy and Leka islands. The tower is painted white with a red roof. Its light emits three flashes in white, green, or red every 12 seconds. The focal height of the light is 5 meters, providing a geographic range of 8.4 nautical miles. Visitors can access the site, but the tower itself is closed to the public.

Why it matters: This lighthouse is essential for vessels navigating the Frøviksund, marking the eastern entrance to this critical passage between Madsøy and Leka. Its directional light warns mariners of the skerry on which it is located.

Light & Optic

Characteristic Signature
Oc (3) White/Red/Green 12s
Flash Type
Occulting
Light Color
White/Red/Green
Flash Count
3 flashes
Interval
12s
Raw Code
Oc(3) WGR 12s
Focal Height
5m
Geographic Range
8.4NM

Location

City
Leka
Country
🇳🇴Norway
Region
Trøndelag
Sea Region
a skerry in the eastern entrance to the Frøviksund, the passage between Madsøy and Leka
Latitude
65.0762°
Longitude
11.6911°

References & Identifiers

Nearest Port
Leka(1.4 km)
Admiralty No.
L1968
NGA No.
9200

Tower & Structure

Tower Height
6m
Tower Shape
square
Tower Color
white with a red roof
Material
fiberglass

Structure: square tower with lantern and gallery

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 Knerten Lighthouse at night?+
Knerten displays the characteristic Oc (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 Knerten Lighthouse guide vessels into?+
Knerten Lighthouse assists vessels approaching 5 nearby ports. The closest is Leka at 1.4 NM to the ENE. Other ports served include Gutvik (3.5 NM E), Kolvereid (12.8 NM S), Djupvik (14.7 NM SW), Ottersøy (16.3 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Knerten Lighthouse still active and maintained?+
Yes, Knerten 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 Knerten Lighthouse?+
Knerten 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 Knerten Lighthouse?+
You can track vessels near Knerten 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.