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Ieodo Lighthouse

Mo White 15s🇰🇷KROperational

Location & Light Range

About Ieodo Lighthouse

Also known as: Ieodo (Socotra Rock, Suyan Rock)

This navigational aid is mounted on a square platform that supports a helipad and a solar-powered research station. Construction of the platform began in 1995 and concluded in 2001, establishing a presence on Socotra Rock. The rock is a submerged reef located 149 km southwest of Mara Island in the East China Sea. The light emits a single white flash every 15 seconds and has a focal height of 37 meters, with a geographic range of 16.6 nautical miles. Visitors can access the site by boat, but the tower itself is closed to the public.

Why it matters: The Ieodo light marks Socotra Rock, a submerged reef that presents a hazard to maritime traffic in the East China Sea. Its location within a disputed maritime zone highlights its significance for navigation and regional oceanographic research.

Light & Optic

Characteristic Signature
Mo White 15s
Flash Type
Morse
Light Color
White
Interval
15s
Raw Code
Mo(U) W 15s
Focal Height
37m
Geographic Range
16.6NM

Construction & History

First Lit
2001

Significant events: platform built 1995-2001

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
square

Structure: A light mounted on a square platform supporting a helipad and solar-powered research station.

Location

Country
🇰🇷KR
Sea Region
East China Sea, 149 km southwest of Mara Island, marking Socotra Rock, a submerged reef
Latitude
32.1228°
Longitude
125.1800°

References & Identifiers

Nearest Port
Hwasun(88.5 km)
Admiralty No.
M4252
NGA No.
17481
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Frequently Asked Questions

How do mariners identify Ieodo Lighthouse at night?+
Ieodo displays the characteristic Mo White 15s. 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 white color may indicate a specific sector or warning zone.
Is Ieodo Lighthouse still active and maintained?+
Yes, Ieodo 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.
How can I track vessels near Ieodo Lighthouse?+
You can track vessels near Ieodo 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.