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Sageungseo Lighthouse

Fl (2) W 5s🇰🇷Masan and Geoje Area, KROperational

Location & Light Range

About Sageungseo Lighthouse

This black, round concrete tower was built and first lit in 2004. It stands 13 meters above sea level and emits a red light that flashes once every 2 seconds. The structure features a white framework with a red band. Located off the northeastern corner of Geojedo, it is accessible only by boat. Its geographic range is 4 nautical miles.

Why it matters: The lighthouse is situated on a dangerous reef.

Light & Optic

Characteristic Signature
Fl (2) W 5s
Flash Type
Flashing
Light Color
White
Flash Count
2 flashes
Interval
5s
Raw Code
Fl.R. period 2s
Focal Height
13m
Geographic Range
4NM

Construction & History

Year Built
2004

References & Identifiers

Admiralty No.
M4351
NGA No.
16780

Tower & Structure

Tower Shape
round
Tower Color
black
Material
concrete

Structure: White framework tower, red banded

Location

City
Masan and Geoje Area
Country
🇰🇷KR
Latitude
35.0306°
Longitude
128.7322°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Sageungseo Lighthouse at night?+
Sageungseo displays the characteristic Fl (2) W 5s — 2 white 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.
Which ports and harbors does Sageungseo Lighthouse guide vessels into?+
Sageungseo Lighthouse assists vessels approaching 5 nearby ports. The closest is Busan New Port at 3.9 NM to the ENE. Other ports served include Jinhae (6.2 NM NNW), Okpo/Geoje (8.5 NM S), Gohyeon/Geoje (10.3 NM SW), Masan (11.3 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sageungseo Lighthouse still active and maintained?+
Yes, Sageungseo 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 Sageungseo Lighthouse?+
Sageungseo 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 Sageungseo Lighthouse?+
You can track vessels near Sageungseo 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.