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Muroran Lighthouse

Occ W 4s🇯🇵Southern Hokkaidō, JPOperational

Muroran Lighthouse is a maritime navigation aid located in Southern Hokkaidō, JP. It is currently operational and active, providing guidance to vessels navigating the surrounding waters. The light sits at a focal height of 46 meters above mean sea level. Under standard atmospheric conditions, the light is visible up to 19 nautical miles (approximately 35.2 km) from the observer.

Light characteristic: The identifying signal of this lighthouse is Occ W 4s. This means the light produces 1 flash every 4 seconds. Mariners use this distinctive pattern to positively identify the light and distinguish it from other aids to navigation in the area. The light displays a white signal, the most common color for major coastal lights.

Visibility and range: With a focal height of 46 meters and a nominal range of 19 nautical miles, this light serves as a major coastal light visible from well offshore. Lights of this range are typically used as landfall lights by vessels approaching from the open sea, helping them make a safe approach to the coast.

Position: Muroran Lighthouse is positioned at 42.3468°N, 140.9278°E, near Southern Hokkaidō in JP. The blue circle on the map represents the nominal 19-nautical-mile range of the light.

Geographic context: Muroran Lighthouse is situated on the Sea of Japan. The location falls within the temperate maritime climate zone.

Nearby lighthouses in JP: Other lighthouses in the region include Abashiri East Breakwater, Abashiri Island Breakwater North End, Abashiri North Breakwater, Abashiri South Breakwater East End, Abuka Kō. View all on the Lighthouses Directory.

Characteristic Signature
Occ W 4s
Flash Type
Occ
Light Color
White
Flash Count
1 flash
Interval
4s
Focal Height
46m
Light Range
19NM (35.2 km)
Status
ACTIVE
City
Southern Hokkaidō
Country
🇯🇵JP
Latitude
42.3468°
Longitude
140.9278°
Flag
Type
Name
Dist.
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How far offshore can Muroran Lighthouse be seen?+
With a focal height of 46 meters and a nominal range of 19 nautical miles (approximately 35.2 km), Muroran 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 Muroran Lighthouse at night?+
Muroran 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 Muroran Lighthouse guide vessels into?+
Muroran Lighthouse assists vessels approaching 5 nearby ports. The closest is Muroran at 1.8 NM to the E. Other ports served include Noboribetsu (12.3 NM ENE), Youra (16.7 NM NW), Shiraoi (20.2 NM ENE), Moriage (20.6 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Muroran Lighthouse still active and maintained?+
Yes, Muroran 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 Muroran Lighthouse?+
You can track vessels near Muroran 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.