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Seorak Hang Lighthouse

Fl Red 4s🇰🇷Sokcho-si, KROperational

Location & Light Range

About Seorak Hang Lighthouse

The Seorak Hang lighthouse, built in 2011, is a red, cylindrical concrete tower standing 10 meters tall. Its focal height reaches 17 meters, providing a geographic range of 12.4 nautical miles. The light emits a single red flash every 4 seconds. This structure is located on the main breakwater of Seorak harbor, south of Daepo harbor in Gangwon State. The tower's design is octagonal and it is painted red. The site is accessible, but the tower itself is closed to the public.

Why it matters: This lighthouse guides fishing vessels and other small craft into Seorak harbor, a key local port. A unique monument of a Korean ski jumper is affixed to the tower, adding a distinctive cultural landmark.

Light & Optic

Characteristic Signature
Fl Red 4s
Flash Type
Flashing
Light Color
Red
Interval
4s
Raw Code
Fl R 4s
Focal Height
17m
Geographic Range
12.4NM

Construction & History

Year Built
2011

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

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

Structure: octagonal cylindrical concrete tower, painted red

Location

City
Sokcho-si
Country
🇰🇷South Korea
Region
Gangwon State
Sea Region
main breakwater at Seorak harbor, south of Daepo harbor, South Korea
Latitude
38.1629°
Longitude
128.6104°

References & Identifiers

Nearest Port
Sokcho(2.1 km)
Admiralty No.
M4457
NGA No.
16420
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Frequently Asked Questions

How do mariners identify Seorak Hang Lighthouse at night?+
Seorak Hang 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 Seorak Hang Lighthouse guide vessels into?+
Seorak Hang Lighthouse assists vessels approaching 5 nearby ports. The closest is Sokcho at 2.9 NM to the NNW. Other ports served include Jumunjin (19.8 NM SSE), Okgye/Gangneung (38.7 NM SSE), Mukho/Donghae (44 NM SSE), Tonghae (44.4 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seorak Hang Lighthouse still active and maintained?+
Yes, Seorak Hang 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 Seorak Hang Lighthouse?+
Seorak Hang 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 Seorak Hang Lighthouse?+
You can track vessels near Seorak Hang 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.