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Krokholmen Lighthouse

Oc (2) White/Red/Green 8s🇳🇴Åfjord, NOOperational

Location & Light Range

About Krokholmen Lighthouse

Established in 1924, Krokholmen Lighthouse is a 7-meter square tower with a lantern and gallery, standing on a small island approximately 1.5 kilometers southwest of a bridge. The lighthouse displays an occulting characteristic of two white flashes every 8 seconds. Its light shifts between white, red, and green depending on the direction, guiding vessels through specific channels. The focal height of the light is 5.5 meters, and its geographic range is 8.6 nautical miles. Access to the site is permitted, though the tower itself is closed to the public. The nearest port is Afjord, located 6.6 kilometers away.

Why it matters: This lighthouse is important for local navigation due to its sector light, which directs vessels through channels near the bridge. Its continued operation ensures safe passage for maritime traffic in these waters.

Light & Optic

Characteristic Signature
Oc (2) White/Red/Green 8s
Flash Type
Occulting
Light Color
White/Red/Green
Flash Count
2 flashes
Interval
8s
Raw Code
Oc(2) 8s
Focal Height
5.5m
Light Range
3NM (5.6 km)
Geographic Range
8.6NM

Construction & History

Year Built
1924

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7m
Tower Shape
square
Tower Color
white

Structure: square tower with lantern and gallery

Location

City
Åfjord
Country
🇳🇴Norway
Region
Trøndelag
Sea Region
on a small island about 1.5 km southwest of the bridge
Latitude
64.0416°
Longitude
10.0225°

References & Identifiers

Nearest Port
Afjord(6.6 km)
Admiralty No.
L1656
NGA No.
8384
Wikidata
Q62066623 →
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Frequently Asked Questions

How far offshore can Krokholmen Lighthouse be seen?+
With a focal height of 5.5 meters and a nominal range of 3 nautical miles (approximately 5.6 km), Krokholmen is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Krokholmen Lighthouse at night?+
Krokholmen displays the characteristic Oc (2) White/Red/Green 8s — 2 white/red/green flashes every 8 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 Krokholmen Lighthouse guide vessels into?+
Krokholmen Lighthouse assists vessels approaching 5 nearby ports. The closest is Stokksund at 0.9 NM to the SE. Other ports served include Herfjord (2.5 NM S), Nordfosen (6.9 NM SE), Lysøysund (10.2 NM SSW), Brandsfjord (12.1 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Krokholmen Lighthouse still active and maintained?+
Yes, Krokholmen 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 Krokholmen Lighthouse?+
Krokholmen 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 Krokholmen Lighthouse?+
You can track vessels near Krokholmen 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.