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Seogmaam Lighthouse

Fl (2) White 5s🇰🇷Pohang-si, KROperational

Location & Light Range

About Seogmaam Lighthouse

This concrete lighthouse stands 13 meters tall with a focal height of 20 meters. The cylindrical tower is painted black and features a single red horizontal band. It is situated on a rocky reef approximately 2 kilometers east of Mopo. The light emits a white flash every 5 seconds and has a geographic range of 13.2 nautical miles. Visitors can access the site, but the tower itself is closed to the public.

Why it matters: The lighthouse warns vessels away from a hazardous rocky reef, aiding safe passage for local fishing boats and other craft navigating the waters near Mopo.

Light & Optic

Characteristic Signature
Fl (2) White 5s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
5s
Raw Code
Fl W 5s
Focal Height
20m
Geographic Range
13.2NM

Location

City
Pohang-si
Country
🇰🇷South Korea
Region
North Gyeongsang
Sea Region
rocky reef about 2 km east of Mopo
Latitude
35.9330°
Longitude
129.5299°

References & Identifiers

Nearest Port
Pohang(6.7 km)
Admiralty No.
M4403.85
NGA No.
16661.6

Tower & Structure

Tower Height
13m
Tower Shape
cylindrical
Tower Color
black with one red horizontal band
Material
concrete

Structure: round concrete tower painted black with one red horizontal band

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 Seogmaam Lighthouse at night?+
Seogmaam displays the characteristic Fl (2) White 5s — 2 white flashes every 5 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 color may indicate a specific sector or warning zone.
Which ports and harbors does Seogmaam Lighthouse guide vessels into?+
Seogmaam Lighthouse assists vessels approaching 5 nearby ports. The closest is Guryongpo at 3.2 NM to the NNE. Other ports served include Pohang (7.8 NM NW), Sinhang/Pohang (9.1 NM N), Mipo/Ulsan (25.4 NM S), Ganggu (26 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seogmaam Lighthouse still active and maintained?+
Yes, Seogmaam 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 Seogmaam Lighthouse?+
Seogmaam Lighthouse is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Seogmaam Lighthouse?+
You can track vessels near Seogmaam 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.