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Ishigaki-ogansaki Lighthouse

Fl W 10s🇯🇵Nansei Shoto, JPInactive

Location & Light Range

About Ishigaki-ogansaki Lighthouse

Also known as: Ogansaki Lighthouse

This fiberglass tower, built in 1983, stands 62 meters above sea level. The round, red structure is topped with a topmark and rests on piles. It emits a single white flash every 10 seconds, visible for 12 nautical miles. The lighthouse is located in Nansei Shoto. Its official designation is Ishigaki-ogansaki.

Light & Optic

Characteristic Signature
Fl W 10s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
10s
Raw Code
Fl.W. period 10s
Focal Height
62m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Construction & History

Year Built
1983

References & Identifiers

Admiralty No.
M4733
NGA No.
13532
Wikipedia
Read on Wikipedia →
Wikidata
Q65275881 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Shape
round
Tower Color
red
Material
fiberglass

Structure: STARBOARD (IALA B) Red glass reinforced plastic(grp) fiberglass tower, topmark, on pile

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
24.4529°
Longitude
124.0794°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How far offshore can Ishigaki-ogansaki Lighthouse be seen?+
With a focal height of 62 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Ishigaki-ogansaki 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 Ishigaki-ogansaki Lighthouse at night?+
Ishigaki-ogansaki displays the characteristic Fl W 10s — 1 white flash every 10 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 Ishigaki-ogansaki Lighthouse guide vessels into?+
Ishigaki-ogansaki Lighthouse assists vessels approaching 4 nearby ports. The closest is Ishigaki at 8 NM to the SSE. Other ports served include Kohama (8.9 NM SW), Funaura (14.9 NM W), Hatoma (17.1 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ishigaki-ogansaki Lighthouse still active and maintained?+
Ishigaki-ogansaki 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.
How can I track vessels near Ishigaki-ogansaki Lighthouse?+
You can track vessels near Ishigaki-ogansaki 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.