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Sadong Hang South Breakwater Lighthouse

Fl G 4s🇰🇷Ulleungdo and Dokdo, KROperational

Location & Light Range

About Sadong Hang South Breakwater Lighthouse

This concrete breakwater light was first lit in 2017. It stands 15 meters above sea level and is housed within a 49-meter-tall, round, white concrete tower. The light emits a single white flash every 5 seconds, visible for 20 nautical miles. The structure is octagonal and includes an AIS with MMSI number 994403581. The light covers a sector from 270 to 110 degrees.

Light & Optic

Characteristic Signature
Fl G 4s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W. period 5s
Focal Height
15m
Geographic Range
20NM

Construction & History

Year Built
2017

References & Identifiers

Admiralty No.
M4445.3.
NGA No.
16544

Tower & Structure

Tower Height
49m
Tower Shape
round
Tower Color
white
Material
concrete

Structure: White octagonal concrete tower; 49. AIS (MMSI No 994403581). W. 270°-110°

Location

City
Ulleungdo and Dokdo
Country
🇰🇷KR
Latitude
37.4588°
Longitude
130.8764°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Sadong Hang South Breakwater Lighthouse at night?+
Sadong Hang South Breakwater displays the characteristic Fl G 4s — 1 green flash every 4 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Sadong Hang South Breakwater Lighthouse guide vessels into?+
Sadong Hang South Breakwater Lighthouse assists vessels approaching 2 nearby ports. The closest is Ulleung at 1.2 NM to the ENE. Other ports served include Dokdo (48.4 NM ESE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sadong Hang South Breakwater Lighthouse still active and maintained?+
Yes, Sadong Hang 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 Sadong Hang South Breakwater Lighthouse?+
Sadong Hang 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 Sadong Hang South Breakwater Lighthouse?+
You can track vessels near Sadong Hang 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.