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Janganseo Lighthouse

Fl Green 4s🇰🇷Geoje-si, KROperational

Location & Light Range

About Janganseo Lighthouse

Janganseo Lighthouse is a 10-meter-tall cylindrical concrete tower with a green exterior. It stands on a round concrete pier with a focal height of 8 meters above sea level. The light emits a green flash every 4 seconds, visible for 9.7 nautical miles. This structure is located near the west end of the bridge connecting Geojedo to Chicheondo, a smaller island to the northwest. Its nearest port is Gohyeon, 4.4 kilometers away.

Why it matters: This lighthouse guides vessels navigating the channel between Geojedo and Chicheondo, offering a clear navigational reference near the bridge connecting the islands.

Light & Optic

Characteristic Signature
Fl Green 4s
Flash Type
Flashing
Light Color
Green
Interval
4s
Raw Code
Fl G 4s
Focal Height
8m
Geographic Range
9.7NM

Location

City
Geoje-si
Country
🇰🇷South Korea
Region
South Gyeongsang
Sea Region
near the west end of the bridge connecting Geojedo to Chicheondo, a smaller island to the northwest
Latitude
34.9761°
Longitude
128.6453°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
green
Material
concrete

Structure: round concrete tower mounted on a round concrete pier

References & Identifiers

Nearest Port
Gohyeon(4.4 km)
Admiralty No.
M4340.8
NGA No.
16824
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Frequently Asked Questions

How do mariners identify Janganseo Lighthouse at night?+
Janganseo displays the characteristic Fl Green 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Janganseo Lighthouse guide vessels into?+
Janganseo Lighthouse assists vessels approaching 5 nearby ports. The closest is Gohyeon/Geoje at 4.9 NM to the SW. Other ports served include Okpo/Geoje (6.2 NM SSE), Geoje (8.2 NM SSW), Jinhae (9.2 NM NNE), Busan New Port (9.3 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Janganseo Lighthouse still active and maintained?+
Yes, Janganseo 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 Janganseo Lighthouse?+
Janganseo 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 Janganseo Lighthouse?+
You can track vessels near Janganseo 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.