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Sonyeam Lighthouse

Fl Red 4s🇰🇷Boryeong-si, KROperational

Location & Light Range

About Sonyeam Lighthouse

Also known as: Sonyeam (Sonyeoam, Soyeo Am)

Sonyeam Lighthouse stands on a reef approximately 5 kilometers west-southwest of Daecheon harbor. This cylindrical concrete tower, painted red, reaches a height of 17 meters. Its focal plane is 11 meters above sea level. The light emits a single red flash every 4 seconds, with a geographic range of 10.7 nautical miles. Access to the site is possible by boat, though the tower itself is not open to the public. The lighthouse is situated near Boryeong-si in the South Chungcheong region of South Korea.

Why it matters: This lighthouse warns vessels of the reef where it is located and serves as a navigational aid for ships approaching or leaving Daecheon harbor.

Light & Optic

Characteristic Signature
Fl Red 4s
Flash Type
Flashing
Light Color
Red
Interval
4s
Raw Code
Fl R 4s
Focal Height
11m
Geographic Range
10.7NM

Location

City
Boryeong-si
Country
🇰🇷South Korea
Region
South Chungcheong
Sea Region
a reef about 5 km west southwest of Daecheon harbor
Latitude
36.3309°
Longitude
126.5057°

References & Identifiers

Nearest Port
Boryeong(4.5 km)
Admiralty No.
M4187
NGA No.
17832

Tower & Structure

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

Structure: round concrete tower, painted red

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 Sonyeam Lighthouse at night?+
Sonyeam displays the characteristic Fl Red 4s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Sonyeam Lighthouse guide vessels into?+
Sonyeam Lighthouse assists vessels approaching 5 nearby ports. The closest is Daecheon at 0.9 NM to the SSW. Other ports served include Boryeong (4.3 NM NNW), Biin (12.9 NM S), Janghang/Seocheon-gun (21.3 NM SSE), Gunsan (21.5 NM S). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sonyeam Lighthouse still active and maintained?+
Yes, Sonyeam 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 Sonyeam Lighthouse?+
You can track vessels near Sonyeam 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.