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Seonyudo Lighthouse

Fl Green 5s🇰🇷Gunsan-si, KROperational

Location & Light Range

About Seonyudo Lighthouse

Also known as: Seonyudo (Munyeodo North)

An octagonal green concrete tower with a double gallery stands 8 meters tall, with its light positioned at 10 meters above sea level. This lighthouse emits a green flash every 5 seconds, visible for 10.4 nautical miles. It is located on a reef north of Munyeodo, marking the northern entrance to the passage between Munyeodo and Seonyudo. The site is accessible by boat, though the tower itself is closed to the public. The nearest port is Gunsan, 12.3 kilometers away.

Why it matters: This lighthouse aids navigation through the reef-strewn waters between Munyeodo and Seonyudo, specifically warning vessels of a reef at the passage's northern entrance.

Light & Optic

Characteristic Signature
Fl Green 5s
Flash Type
Flashing
Light Color
Green
Interval
5s
Raw Code
Fl G 5s
Focal Height
10m
Geographic Range
10.4NM

Location

City
Gunsan-si
Country
🇰🇷South Korea
Region
Jeonbuk State
Sea Region
northern entrance to the passage between Munyeodo and Seonyudo, north of Munyeodo
Latitude
35.8111°
Longitude
126.4383°

References & Identifiers

Nearest Port
Gunsan(12.3 km)
Admiralty No.
M4206.3625.
NGA No.
M4206.3625

Tower & Structure

Tower Height
8m
Tower Shape
octagonal
Tower Color
green
Material
concrete

Structure: octagonal green concrete tower with double 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 Seonyudo Lighthouse at night?+
Seonyudo displays the characteristic Fl Green 5s. 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Seonyudo Lighthouse guide vessels into?+
Seonyudo Lighthouse assists vessels approaching 5 nearby ports. The closest is Gunsan at 12.3 NM to the NE. Other ports served include Janghang/Seocheon-gun (16.9 NM NE), Sangwangdeungdo (17.7 NM WSW), Biin (18.5 NM N), Daecheon (30.5 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seonyudo Lighthouse still active and maintained?+
Yes, Seonyudo 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.
How can I track vessels near Seonyudo Lighthouse?+
You can track vessels near Seonyudo 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.