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Oki Ko Lighthouse

Fl G 3s🇯🇵Nanpo-Shoto, JPOperational

Location & Light Range

About Oki Ko Lighthouse

Oki Ko is an operational lighthouse situated in Nanpo-Shoto. It exhibits a single green flash every 3 seconds. The light's focal height above sea level is 12 meters. Its geographic range extends to 7 nautical miles.

Light & Optic

Characteristic Signature
Fl G 3s
Flash Type
Flashing
Light Color
Green
Flash Count
1 flash
Interval
3s
Raw Code
Fl.G. period 3s
Focal Height
12m
Light Range
7NM (13.0 km)
Geographic Range
7NM

References & Identifiers

Admiralty No.
M8351
NGA No.
4974

Location

City
Nanpo-Shoto
Country
🇯🇵JP
Latitude
26.6348°
Longitude
142.1588°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Oki Ko Lighthouse be seen?+
With a focal height of 12 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Oki Ko is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Oki Ko Lighthouse at night?+
Oki Ko displays the characteristic Fl G 3s — 1 green flash every 3 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. The green color may indicate a specific sector or warning zone.
Is Oki Ko Lighthouse still active and maintained?+
Yes, Oki Ko 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 Oki Ko Lighthouse?+
You can track vessels near Oki Ko 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.