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Agunishima Lighthouse

Occ W 4s🇯🇵Nansei Shoto, JPOperational

Location & Light Range

About Agunishima Lighthouse

Agunishima Lighthouse began operation in 1978. The 16-meter tower emits an occulting white light, where the light is obscured for periods. This signal repeats every 4 seconds. The lighthouse has a focal height of 108 meters.

Why it matters: The lighthouse offers a geographic range of 12 nautical miles.

Light & Optic

Characteristic Signature
Occ W 4s
Flash Type
Occ
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Oc.W. period 4s
Focal Height
108m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Construction & History

Year Built
1978

References & Identifiers

Admiralty No.
M4739.48
NGA No.
13472
Wikidata
Q125940157 →

Tower & Structure

Tower Height
16m

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
26.5772°
Longitude
127.2122°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Agunishima Lighthouse be seen?+
With a focal height of 108 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Agunishima 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 Agunishima Lighthouse at night?+
Agunishima displays the characteristic Occ 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 Agunishima Lighthouse guide vessels into?+
Agunishima Lighthouse assists vessels approaching 5 nearby ports. The closest is Zamami at 21.7 NM to the SSE. Other ports served include Tokashiki (24.2 NM SSE), Kanegusuku (28.5 NM WSW), Naha, Okinawa (32.3 NM SE), Ginowan (33.3 NM SE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Agunishima Lighthouse still active and maintained?+
Yes, Agunishima 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 Agunishima Lighthouse?+
You can track vessels near Agunishima 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.