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Susan Dan North Breakwater Spur Lighthouse

Fl (2) Red 5s🇰🇷Sonyang, KROperational

Location & Light Range

About Susan Dan North Breakwater Spur Lighthouse

The Susan Dan North Breakwater Spur lighthouse is a cylindrical concrete tower standing 10 meters tall, with its focal plane at 18 meters. Painted red, the structure marks the extremity of a spur extending from the north breakwater into Susan harbor. This aid to navigation has a geographic range of 12.7 nautical miles. It emits a red flash every 5 seconds to guide vessels. The site is accessible to the public, offering views of the harbor, but the tower itself remains closed.

Why it matters: This lighthouse is essential for vessels navigating the approach to Susan harbor, clearly delineating the end of the north breakwater spur and preventing incursions into hazardous areas.

Light & Optic

Characteristic Signature
Fl (2) Red 5s
Flash Type
Flashing
Light Color
Red
Flash Count
2 flashes
Interval
5s
Raw Code
Fl R 5s
Focal Height
18m
Geographic Range
12.7NM

Location

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

References & Identifiers

Nearest Port
Sokcho(8.0 km)
Admiralty No.
M4456.555.
NGA No.
M4456.555

Tower & Structure

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

Structure: round cylindrical 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 Susan Dan North Breakwater Spur Lighthouse at night?+
Susan Dan North Breakwater Spur displays the characteristic Fl (2) Red 5s — 2 red 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Susan Dan North Breakwater Spur Lighthouse guide vessels into?+
Susan Dan North Breakwater Spur 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 North Breakwater Spur Lighthouse still active and maintained?+
Yes, Susan Dan North Breakwater Spur 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 North Breakwater Spur Lighthouse?+
Susan Dan North Breakwater Spur 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 North Breakwater Spur Lighthouse?+
You can track vessels near Susan Dan North Breakwater Spur 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.