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Susan Dan South Breakwater Lighthouse

Fl Green 4s🇰🇷Sonyang, KROperational

Location & Light Range

About Susan Dan South Breakwater Lighthouse

A 10-meter tall, white cylindrical concrete tower. Its light, reaching a focal height of 15 meters, has a geographic range of 11.9 nautical miles. The light characteristic is a Green flash every 4 seconds (Fl G 4s). The location is at the end of the south breakwater for Susan harbor. Public access is permitted to the site, but not within the tower. Sokcho port is 8 kilometers distant.

Why it matters: This navigation aid marks the end of the south breakwater, guiding vessels approaching Susan harbor.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
15m
Geographic Range
11.9NM

Location

City
Sonyang
Country
🇰🇷South Korea
Region
Gangwon State
Sea Region
Susan harbor, at the end of the south breakwater
Latitude
38.0775°
Longitude
128.6793°

References & Identifiers

Nearest Port
Sokcho(8.0 km)
Admiralty No.
M4456.56.

Tower & Structure

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

Structure: round cylindrical concrete tower, painted white

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 Susan Dan South Breakwater Lighthouse at night?+
Susan Dan South Breakwater displays the characteristic Fl Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Susan Dan South Breakwater Lighthouse guide vessels into?+
Susan Dan South Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Sokcho at 8.9 NM to the NNW. Other ports served include Jumunjin (13.7 NM SSE), Okgye/Gangneung (32.6 NM SSE), Mukho/Donghae (38 NM SSE), Tonghae (38.3 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Susan Dan South Breakwater Lighthouse still active and maintained?+
Yes, Susan Dan South Breakwater 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 Susan Dan South Breakwater Lighthouse?+
Susan Dan South Breakwater 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 Susan Dan South Breakwater Lighthouse?+
You can track vessels near Susan Dan South Breakwater 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.