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Janggundo Lighthouse

Fl Yellow 6s🇰🇷Yeosu-si, KROperational

Location & Light Range

About Janggundo Lighthouse

Also known as: Janggundo (Changgundo)

The Janggundo Lighthouse is an octagonal concrete tower completed in 1986. Standing 10 meters tall, its focal plane reaches 12 meters above sea level. It emits a yellow flash every six seconds and has a geographic range of 11 nautical miles. Located at the northwestern corner of Janggungdo, an island in the center of Yeosu's harbor, it is situated 0.1 kilometers from the nearest port. The site is open to the public, but the tower is closed.

Why it matters: This lighthouse was important for navigating the shipping lanes within Yeosu's harbor. Its position at the northwestern corner of Janggungdo marked a key point for maritime traffic entering or exiting the port.

Light & Optic

Characteristic Signature
Fl Yellow 6s
Flash Type
Flashing
Light Color
Yellow
Interval
6s
Raw Code
Fl Y 6s
Focal Height
12m
Geographic Range
11NM

Construction & History

Year Built
1986

Significant events: Inactive since 2018

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
octagonal
Tower Color
white
Material
concrete

Structure: octagonal white concrete tower

Location

City
Yeosu-si
Country
🇰🇷South Korea
Region
South Jeolla
Sea Region
an island in the center of Yeosu's harbor, at the northwestern corner of Janggungdo
Latitude
34.7342°
Longitude
127.7344°

References & Identifiers

Nearest Port
Yeosu(0.1 km)
Admiralty No.
M4310.57
NGA No.
17136
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Frequently Asked Questions

How do mariners identify Janggundo Lighthouse at night?+
Janggundo displays the characteristic Fl Yellow 6s. 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 yellow color may indicate a specific sector or warning zone.
Which ports and harbors does Janggundo Lighthouse guide vessels into?+
Janggundo Lighthouse assists vessels approaching 5 nearby ports. The closest is Yeosu at 3.2 NM to the W. Other ports served include Samil (8.3 NM NNE), Gwangyang (9.1 NM N), Samcheonpo/Sacheon (20.4 NM ENE), Junghwa (31.3 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Janggundo Lighthouse still active and maintained?+
Yes, Janggundo 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 Janggundo Lighthouse?+
Janggundo 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 Janggundo Lighthouse?+
You can track vessels near Janggundo 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.