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Rata Storgrund Lighthouse

Fl (2) White/Red/Green 6s🇸🇪Robertsfors kommun, SEOperational

Location & Light Range

About Rata Storgrund Lighthouse

This concrete, cylindrical tower stands 17 meters tall on a shoal in the Gulf of Bothnia, east of Ratan. Built in 1975, its upper half is painted white and the lower half red. The focal height of its light is 16 meters. This lighthouse emits two white, red, or green flashes every six seconds, with the color indicating the direction of approach. The structure includes a lantern and gallery. While the site is open, the tower is closed to the public.

Why it matters: This lighthouse warns vessels of the Rata Storgrund shoal and provides directional guidance through the northern shipping routes of the Baltic Sea with its color-changing light.

Light & Optic

Characteristic Signature
Fl (2) White/Red/Green 6s
Flash Type
Flashing
Light Color
White/Red/Green
Flash Count
2 flashes
Interval
6s
Raw Code
Fl(2) WRG 6s
Focal Height
16m
Light Range
8.6NM (15.9 km)
Geographic Range
12.2NM

Construction & History

Year Built
1975

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
17m
Tower Shape
cylindrical
Tower Color
Upper half white, lower half red
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery

Location

City
Robertsfors kommun
Country
🇸🇪Sweden
Region
Västerbotten County
Sea Region
A shoal in the Gulf of Bothnia, east of Ratan.
Latitude
63.9867°
Longitude
21.1167°

References & Identifiers

Nearest Port
Sikea(11.1 km)
Admiralty No.
C5847
NGA No.
11308
ARLHS No.
SWE-318
Wikidata
Q32307646 →
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Frequently Asked Questions

How far offshore can Rata Storgrund Lighthouse be seen?+
With a focal height of 16 meters and a nominal range of 8.6 nautical miles (approximately 15.9 km), Rata Storgrund is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Rata Storgrund Lighthouse at night?+
Rata Storgrund displays the characteristic Fl (2) White/Red/Green 6s — 2 white/red/green flashes every 6 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 Rata Storgrund Lighthouse guide vessels into?+
Rata Storgrund Lighthouse assists vessels approaching 5 nearby ports. The closest is BYVIKEN at 12.8 NM to the SSW. Other ports served include Böda (14.8 NM N), Umeå (24.7 NM WSW), Holmsund (26.9 NM SW), Obbola (26.9 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Rata Storgrund Lighthouse still active and maintained?+
Yes, Rata Storgrund 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 Rata Storgrund Lighthouse?+
Rata Storgrund 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 Rata Storgrund Lighthouse?+
You can track vessels near Rata Storgrund 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.