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Satsuma-okinoshima Lighthouse

Fl W 4s🇯🇵Kyushu-West Coast, JPInactive

Location & Light Range

About Satsuma-okinoshima Lighthouse

This deactivated lighthouse features a 7-meter-tall rectangular latticed white tower. The focal height reaches 86 meters above sea level, providing a geographic range of 12 nautical miles. Its light once emitted a single white flash every 4 seconds. The structure is identified by NGA list number 11128 and Admiralty number M5091.

Light & Optic

Characteristic Signature
Fl W 4s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W. period 4s
Focal Height
86m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Location

City
Kyushu-West Coast
Country
🇯🇵JP
Latitude
31.7400°
Longitude
130.1798°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
7m
Tower Shape
latticed
Tower Color
white

Structure: Rectangular latticed tower; 7. Private

References & Identifiers

Admiralty No.
M5091
NGA No.
11128
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Frequently Asked Questions

How far offshore can Satsuma-okinoshima Lighthouse be seen?+
With a focal height of 86 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Satsuma-okinoshima is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Satsuma-okinoshima Lighthouse at night?+
Satsuma-okinoshima 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 Satsuma-okinoshima Lighthouse guide vessels into?+
Satsuma-okinoshima Lighthouse assists vessels approaching 5 nearby ports. The closest is Hashima at 1.7 NM to the NE. Other ports served include Ichikikushikino (4.7 NM ESE), Muta, Nagasaki (6.4 NM NE), Satsumasendai (6.4 NM N), Satsumasendai (6.7 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Satsuma-okinoshima Lighthouse still active and maintained?+
Satsuma-okinoshima Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
What shipping routes pass near Satsuma-okinoshima Lighthouse?+
Satsuma-okinoshima 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 Satsuma-okinoshima Lighthouse?+
You can track vessels near Satsuma-okinoshima 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.