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Ryukyu-kannonsaki Lighthouse

Iso W 6s🇯🇵Nansei Shoto, JPInactive

Location & Light Range

About Ryukyu-kannonsaki Lighthouse

The Ryukyu-kannonsaki lighthouse is a white and red round concrete tower measuring 148 meters in height. Its focal plane stands 20 meters above sea level, and it emits an isophase white light that completes a cycle every 6 seconds. The tower's structure is round and constructed from concrete. This light has a geographic range of 8 nautical miles.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
20m
Light Range
8NM (14.8 km)
Geographic Range
8NM

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
24.3653°
Longitude
124.1119°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
148m
Tower Shape
round
Tower Color
white and red
Material
concrete

Structure: White round concrete tower, red banded; 148

References & Identifiers

Admiralty No.
M4732
NGA No.
13536
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Frequently Asked Questions

How far offshore can Ryukyu-kannonsaki Lighthouse be seen?+
With a focal height of 20 meters and a nominal range of 8 nautical miles (approximately 14.8 km), Ryukyu-kannonsaki 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 Ryukyu-kannonsaki Lighthouse at night?+
Ryukyu-kannonsaki displays the characteristic Iso W 6s — 1 white flash every 6 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 Ryukyu-kannonsaki Lighthouse guide vessels into?+
Ryukyu-kannonsaki Lighthouse assists vessels approaching 4 nearby ports. The closest is Ishigaki at 2.9 NM to the ESE. Other ports served include Kohama (7.3 NM WSW), Funaura (16.6 NM W), Hatoma (19.8 NM WNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ryukyu-kannonsaki Lighthouse still active and maintained?+
Ryukyu-kannonsaki 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 Ryukyu-kannonsaki Lighthouse?+
You can track vessels near Ryukyu-kannonsaki 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.