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Onpyeong (On Pyeong) Reef Lighthouse

Fl White 10s🇰🇷Seogwipo-si, KROperational

Location & Light Range

About Onpyeong (On Pyeong) Reef Lighthouse

This cylindrical concrete lighthouse stands 13 meters tall, with its light positioned 14 meters above sea level. The tower is painted black and features a single yellow horizontal band. It emits a white flash every 10 seconds, visible for 11.6 nautical miles. The structure includes a gallery, and the site is accessible to the public, though the tower itself is closed. The lighthouse is located near Seogwipo-si in the Jeju region of South Korea.

Why it matters: The lighthouse marks the Onpyeong Reef, a hazard to navigation. Its light assists vessels, particularly those involved in local fishing and coastal trade, in avoiding groundings.

Light & Optic

Characteristic Signature
Fl White 10s
Flash Type
Flashing
Light Color
White
Interval
10s
Raw Code
Fl W 10s
Focal Height
14m
Geographic Range
11.6NM

Location

City
Seogwipo-si
Country
🇰🇷South Korea
Region
Jeju
Sea Region
Onpyeong (On Pyeong) Reef
Latitude
33.3951°
Longitude
126.9113°

References & Identifiers

Nearest Port
Seongsan-po(5.0 km)
Admiralty No.
M4272.54
NGA No.
17440

Tower & Structure

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

Structure: round cylindrical concrete tower with gallery, painted black with one yellow 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 Onpyeong (On Pyeong) Reef Lighthouse at night?+
Onpyeong (On Pyeong) Reef displays the characteristic Fl White 10s. 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 Onpyeong (On Pyeong) Reef Lighthouse guide vessels into?+
Onpyeong (On Pyeong) Reef Lighthouse assists vessels approaching 5 nearby ports. The closest is Seongsan-po at 4.8 NM to the N. Other ports served include NAMWON (11.9 NM SW), Jeju (19.4 NM WNW), Seogwipo (19.6 NM WSW), Kwangyang (20 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Onpyeong (On Pyeong) Reef Lighthouse still active and maintained?+
Yes, Onpyeong (On Pyeong) Reef 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 Onpyeong (On Pyeong) Reef Lighthouse?+
You can track vessels near Onpyeong (On Pyeong) Reef 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.