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Kurushima-shiroishi Lighthouse

Fl R 3s🇯🇵Seto Naikai Western, JPOperational

Location & Light Range

About Kurushima-shiroishi Lighthouse

This lighthouse features a white and red latticed mast structure standing 12 meters tall. Its focal height reaches 13 meters above sea level. A red and white rectangular daymark is affixed to the mast. The light emitted is red and displays a single flash every 3 seconds. Its geographic range extends to 7 nautical miles.

Light & Optic

Characteristic Signature
Fl R 3s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
3s
Raw Code
Fl.R. period 3s
Focal Height
13m
Light Range
7NM (13.0 km)
Geographic Range
7NM

Location

City
Seto Naikai Western
Country
🇯🇵JP
Latitude
34.1069°
Longitude
132.9834°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Shape
mast
Tower Color
white and red

Structure: Latticed mast, red and white rectangular daymark; 12

References & Identifiers

Admiralty No.
M5462
NGA No.
8724
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Frequently Asked Questions

How far offshore can Kurushima-shiroishi Lighthouse be seen?+
With a focal height of 13 meters and a nominal range of 7 nautical miles (approximately 13.0 km), Kurushima-shiroishi is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. As a shorter-range light, it primarily serves nearshore and coastal traffic.
How do mariners identify Kurushima-shiroishi Lighthouse at night?+
Kurushima-shiroishi displays the characteristic Fl R 3s — 1 red flash every 3 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. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Kurushima-shiroishi Lighthouse guide vessels into?+
Kurushima-shiroishi Lighthouse assists vessels approaching 5 nearby ports. The closest is Hashihama at 0.6 NM to the WNW. Other ports served include Namikata (1.8 NM NW), Imabari (3.1 NM SSE), Yoshiumi (4.1 NM NE), Okamura (6.6 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Kurushima-shiroishi Lighthouse still active and maintained?+
Yes, Kurushima-shiroishi 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.
What shipping routes pass near Kurushima-shiroishi Lighthouse?+
Kurushima-shiroishi 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 Kurushima-shiroishi Lighthouse?+
You can track vessels near Kurushima-shiroishi 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.