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Okishiine Shima Lighthouse

Fl W 4s🇰🇷Tsushima, KROperational

Location & Light Range

About Okishiine Shima Lighthouse

The Okishiine Shima lighthouse, built and first lit in 1977, stands on a concrete round tower. Its white and red banded exterior houses a light with a focal height of 21 meters. This structure emits a red flash every 3 seconds. A radar reflector is also fitted to the tower. The lighthouse is situated on a skerry approximately 500 meters offshore from Tsushima's northern coast.

Why it matters: This lighthouse marks a skerry off the north coast of Tsushima.

Light & Optic

Characteristic Signature
Fl W 4s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.R. period 3s
Focal Height
21m
Geographic Range
1NM

Construction & History

Year Built
1977

References & Identifiers

Admiralty No.
M5067
NGA No.
12488

Tower & Structure

Tower Shape
round
Tower Color
white and red
Material
concrete

Structure: White cylindrical tower, red banded. Radar reflector

Location

City
Tsushima
Country
🇰🇷KR
Latitude
34.7059°
Longitude
129.4629°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Okishiine Shima Lighthouse at night?+
Okishiine Shima displays the characteristic Fl W 4s — 1 white flash every 4 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 Okishiine Shima Lighthouse guide vessels into?+
Okishiine Shima Lighthouse assists vessels approaching 5 nearby ports. The closest is Izumi at 1.8 NM to the SSE. Other ports served include Izumi, Aichi (1.9 NM SSE), Oura/Uchinoura (2.4 NM SW), Hitakatsu (3.1 NM S), Sasuna (5.2 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Okishiine Shima Lighthouse still active and maintained?+
Yes, Okishiine Shima 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 Okishiine Shima Lighthouse?+
Okishiine Shima 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 Okishiine Shima Lighthouse?+
You can track vessels near Okishiine Shima 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.