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Chidudo Lighthouse

Fl White 6s🇰🇷Gunsan-si, KROperational

Location & Light Range

About Chidudo Lighthouse

Also known as: Chidudo (Biando, Pian-do)

The Chidudo Lighthouse is a yellow, cylindrical concrete tower standing 10 meters tall, with its light positioned 17 meters above sea level. It is situated on a skerry off the southeastern tip of Biando, near Gunsan-si in South Korea's Jeonbuk State. This lighthouse emits a white light with one flash every six seconds, visible for 12.4 nautical miles. The site is open to visitors who can arrive by boat, though the tower itself is not accessible to the public. Its location guides vessels navigating the coastal waters.

Why it matters: The Chidudo Lighthouse marks a skerry off Biando, guiding local shipping and fishing vessels and helping to prevent groundings on the rocky coastal features.

Light & Optic

Characteristic Signature
Fl White 6s
Flash Type
Flashing
Light Color
White
Interval
6s
Raw Code
Fl W 6s
Focal Height
17m
Geographic Range
12.4NM

Location

City
Gunsan-si
Country
🇰🇷South Korea
Region
Jeonbuk State
Sea Region
a skerry off the southeastern tip of Biando, South Korea
Latitude
35.7263°
Longitude
126.4596°

References & Identifiers

Nearest Port
Gunsan(16.6 km)
Admiralty No.
M4206.85
NGA No.
17746.5

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
yellow
Material
concrete

Structure: round cylindrical white concrete tower

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 Chidudo Lighthouse at night?+
Chidudo displays the characteristic Fl White 6s. 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 color may indicate a specific sector or warning zone.
Which ports and harbors does Chidudo Lighthouse guide vessels into?+
Chidudo Lighthouse assists vessels approaching 5 nearby ports. The closest is Gunsan at 16.4 NM to the NNE. Other ports served include Sangwangdeungdo (16.6 NM WSW), Janghang/Seocheon-gun (20.1 NM NNE), Biin (23.5 NM N), Daecheon (35.5 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Chidudo Lighthouse still active and maintained?+
Yes, Chidudo 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 Chidudo Lighthouse?+
You can track vessels near Chidudo 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.