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Ulgi Lighthouse

Fl W 10s🇰🇷Ulsan, KROperational

Location & Light Range

About Ulgi Lighthouse

The Ulgi Lighthouse, an octagonal concrete structure, was established in 1906 in Ulsan. Its tower stands 24 meters tall, painted with alternating red and white bands. The light, visible for 26 nautical miles, emits a white flash every 10 seconds. The focal height reaches 52 meters above sea level. This lighthouse became operational in 1906, serving the coastal area.

Why it matters: This lighthouse has a geographic range of 26 nautical miles.

Background
The Ulgi Lighthouse (Korean: 울기등대) is a lighthouse in Ulsan, South Korea.

Light & Optic

Characteristic Signature
Fl W 10s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
10s
Raw Code
Fl.W. period 10s
Focal Height
52m
Geographic Range
26NM

Construction & History

Year Built
1906

References & Identifiers

Admiralty No.
M4394
NGA No.
16680
Wikipedia
Read on Wikipedia →
Wikidata
Q12609075 →

Tower & Structure

Tower Height
24m
Tower Shape
octagonal
Tower Color
white and red
Material
concrete

Structure: Red tower, white banded; 59

Location

City
Ulsan
Country
🇰🇷KR
Latitude
35.4927°
Longitude
129.4432°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Ulgi Lighthouse at night?+
Ulgi displays the characteristic Fl W 10s — 1 white flash every 10 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 Ulgi Lighthouse guide vessels into?+
Ulgi Lighthouse assists vessels approaching 5 nearby ports. The closest is Mipo/Ulsan at 1.5 NM to the NNW. Other ports served include Ulsan (3.2 NM WNW), Onsan/Ulsan (5.1 NM SW), Busanjin-Gu (28.2 NM SW), South Busan (28.5 NM SSW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ulgi Lighthouse still active and maintained?+
Yes, Ulgi 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 Ulgi Lighthouse?+
Ulgi 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 Ulgi Lighthouse?+
You can track vessels near Ulgi 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.