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Rönngrund Lighthouse

VQ (2) White/Red/Green 6s🇫🇮Pargas, FIOperational

Location & Light Range

About Rönngrund Lighthouse

Rönngrund Lighthouse is a 5-meter-tall square concrete tower with a lantern and gallery, standing on a skerry north of Innamo. Its focal height is 8 meters, and it emits two quick white flashes every 6 seconds, with a geographic range of 9.7 nautical miles. The light can also be white, red, or green, serving to mark the channel. The site is open to visitors, though the tower itself is closed to the public. This navigational aid is situated in the Southwest Finland region, near the city of Pargas.

Why it matters: The lighthouse is essential for safe passage through a specific branch channel connecting Turku to the northern coast of the province, warning vessels of shallow waters and the skerry it marks.

Light & Optic

Characteristic Signature
VQ (2) White/Red/Green 6s
Flash Type
Very Quick
Light Color
White/Red/Green
Flash Count
2 flashes
Interval
6s
Raw Code
VQ(2) 6s
Focal Height
8m
Light Range
6.5NM (12.0 km)
Geographic Range
9.7NM

Location

City
Pargas
Country
🇫🇮Finland
Region
Southwest Finland
Sea Region
Located on a skerry north of Innamo, guiding vessels in a branch channel connecting Turku to the northern coast of the province.
Latitude
60.2758°
Longitude
21.7861°

References & Identifiers

Nearest Port
Nagu(6.2 km)
Admiralty No.
C4785.
Wikidata
Q62030525 →

Tower & Structure

Tower Height
5m
Tower Shape
square
Tower Color
white
Material
concrete

Structure: square concrete 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 far offshore can Rönngrund Lighthouse be seen?+
With a focal height of 8 meters and a nominal range of 6.5 nautical miles (approximately 12.0 km), Rönngrund 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 Rönngrund Lighthouse at night?+
Rönngrund displays the characteristic VQ (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 Rönngrund Lighthouse guide vessels into?+
Rönngrund Lighthouse assists vessels approaching 5 nearby ports. The closest is Nauvo (Nagu) at 6.8 NM to the SE. Other ports served include Rymättylä (Rimito) (7.3 NM NE), Korppoo (Korpo) (9.3 NM SW), Velkua (10.9 NM NNW), Houtskari (Houtskär) (12.5 NM WSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Rönngrund Lighthouse still active and maintained?+
Yes, Rönngrund 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 Rönngrund Lighthouse?+
Rönngrund 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 Rönngrund Lighthouse?+
You can track vessels near Rönngrund 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.