Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Susan Dan North Breakwater Lighthouse

Fl Red 4s🇰🇷Sonyang, KROperational

Location & Light Range

About Susan Dan North Breakwater Lighthouse

This red, cylindrical concrete tower stands 10 meters tall on the north breakwater of Susan harbor. Its focal plane is 17 meters above the water, emitting a red flash every 4 seconds. The lighthouse has a geographic range of 12.4 nautical miles. It was constructed of concrete and painted red. The site is open to the public, though the tower itself is not accessible.

Why it matters: This lighthouse marks the north breakwater entrance to Susan harbor, aiding vessels navigating the busy port approach.

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

Location

City
Sonyang
Country
🇰🇷South Korea
Region
Gangwon State
Sea Region
north breakwater of Susan harbor
Latitude
38.0775°
Longitude
128.6793°

References & Identifiers

Nearest Port
Sokcho(8.0 km)
Admiralty No.
M4456.55.
NGA No.
M4456.55

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.
Live tracking · 50,000+ mariners

Find Susan Dan North Breakwater Lighthouse on the live nautical map

Plan voyages near South Korea, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Susan Dan North Breakwater Lighthouse at night?+
Susan Dan North Breakwater 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 Susan Dan North Breakwater Lighthouse guide vessels into?+
Susan Dan North 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 North Breakwater Lighthouse still active and maintained?+
Yes, Susan Dan North 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 North Breakwater Lighthouse?+
Susan Dan North 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 North Breakwater Lighthouse?+
You can track vessels near Susan Dan North 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.