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Mefjordbåen Lighthouse

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

Location & Light Range

About Mefjordbåen Lighthouse

Mefjordbåen is a 13-meter tall, slender, round cylindrical tower situated approximately 3 kilometers from the Vestfold region's western shore, northeast of Tønsberg. This functioning navigation marker supports a round watch room structure topped with a small lantern. Its light produces two white flashes with intervening occultations every 8 seconds, showing white, red, or green, and has a geographic range of 11.3 nautical miles. The location is accessible to the public, but the tower is not open for entry. Slagen, the closest port, lies 1.6 kilometers distant.

Why it matters: This lighthouse marks the lower Oslofjord, offering navigation assistance to ships in the area west of Tønsberg. Its light characteristic aids safe transit for marine traffic in this channel.

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) WRG 8s
Focal Height
13m
Geographic Range
11.3NM

Location

City
Tønsberg
Country
🇳🇴Norway
Region
Vestfold
Sea Region
Lower Oslofjord, about 3 km off the west coast, northeast of Tønsberg.
Latitude
59.3353°
Longitude
10.5703°

References & Identifiers

Nearest Port
Slagen(1.6 km)
Admiralty No.
B2482.5
NGA No.
646
ARLHS No.
NOR-302

Tower & Structure

Tower Height
13m
Tower Shape
cylindrical

Structure: slender round cylindrical tower supporting a round watch room structure with a small lantern on the roof

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 Mefjordbåen Lighthouse at night?+
Mefjordbåen 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 Mefjordbåen Lighthouse guide vessels into?+
Mefjordbåen Lighthouse assists vessels approaching 5 nearby ports. The closest is Slagen at 1.6 NM to the SW. Other ports served include Slagentangen (1.8 NM WSW), Larkollen (2.4 NM E), Valløy (4.7 NM SSW), Lindås (5 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Mefjordbåen Lighthouse still active and maintained?+
Yes, Mefjordbåen 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 Mefjordbåen Lighthouse?+
Mefjordbåen 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 Mefjordbåen Lighthouse?+
You can track vessels near Mefjordbåen 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.