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Daemaeyeo Lighthouse

Fl Green 6s🇰🇷Incheon, KROperational

Location & Light Range

About Daemaeyeo Lighthouse

Also known as: Daemaeyeo (Achado Northeast)

A 17-meter-tall cylindrical concrete tower, painted green, was constructed in 2007. It stands on a round concrete pier with a double gallery. The lighthouse emits a single green flash every six seconds from a focal height of 11 meters. This operational aid has a geographic range of 10.7 nautical miles. The structure is located off the northeast side of Achado island, approximately 10 kilometers southwest of Seokmodo, within the Ganghwa-gun region of South Korea. While the site can be reached by boat, the tower itself is closed to the public.

Why it matters: The Daemaeyeo lighthouse aids vessels navigating the waters between Achado and Seokmodo islands, helping them identify safe channels in this coastal area.

Light & Optic

Characteristic Signature
Fl Green 6s
Flash Type
Flashing
Light Color
Green
Interval
6s
Raw Code
Fl G 6s
Focal Height
11m
Geographic Range
10.7NM

Construction & History

Year Built
2007

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
17m
Tower Shape
cylindrical
Tower Color
green
Material
concrete

Structure: round cylindrical concrete tower with double gallery, mounted on a round concrete pier

Location

City
Incheon
Country
🇰🇷South Korea
Region
Ganghwa-gun
Sea Region
off the northeast side of Achado island, about 10 km southwest of Seokmodo
Latitude
37.6606°
Longitude
126.2468°

References & Identifiers

Nearest Port
Incheon(19.8 km)
Admiralty No.
M4146.53.
NGA No.
M4146.53
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Frequently Asked Questions

How do mariners identify Daemaeyeo Lighthouse at night?+
Daemaeyeo displays the characteristic Fl Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Daemaeyeo Lighthouse guide vessels into?+
Daemaeyeo Lighthouse assists vessels approaching 5 nearby ports. The closest is Gyeongin at 18.5 NM to the ESE. Other ports served include Incheon (19.3 NM SE), BUCHEON (25.8 NM ESE), Yeonpyeongdo (26 NM W), Haeju (33.1 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Daemaeyeo Lighthouse still active and maintained?+
Yes, Daemaeyeo 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 Daemaeyeo Lighthouse?+
You can track vessels near Daemaeyeo 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.