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Isso Lighthouse

Fl W 10s🇯🇵Nansei Shoto, JPInactive

Location & Light Range

About Isso Lighthouse

This disused lighthouse is situated in Nansei Shoto. The structure comprises piles and features a square green daymark. Its focal height reached 44 meters, and it emitted a white light. The light flashed once every 10 seconds.

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
44m
Light Range
18NM (33.3 km)
Geographic Range
18NM

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
30.4689°
Longitude
130.4975°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
square
Tower Color
green

Structure: Piles, green square daymark

References & Identifiers

Admiralty No.
M4790
NGA No.
13064
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Frequently Asked Questions

How far offshore can Isso Lighthouse be seen?+
With a focal height of 44 meters and a nominal range of 18 nautical miles (approximately 33.3 km), Isso is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. Lights of this range are typically used as landfall lights by vessels approaching from the open sea.
How do mariners identify Isso Lighthouse at night?+
Isso 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 Isso Lighthouse guide vessels into?+
Isso Lighthouse assists vessels approaching 5 nearby ports. The closest is Yakushima at 4.8 NM to the ESE. Other ports served include Kusukawa (6.2 NM ESE), Usuka (6.2 NM ESE), Tabu (7.6 NM ESE), Mugi (12.7 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Isso Lighthouse still active and maintained?+
Isso 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 Isso Lighthouse?+
Isso 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 Isso Lighthouse?+
You can track vessels near Isso 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.