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Rumoi South Breakwater Lighthouse

Fl Red 3s🇯🇵Rumoi, JPOperational

Location & Light Range

About Rumoi South Breakwater Lighthouse

A red, cylindrical concrete tower 14 meters high stands at the end of the south breakwater in Rumoi, Hokkaido Prefecture. This structure, built in 1974, has a focal height of 16 meters and emits a red flash every three seconds. The original lighthouse was established in 1932, and when the breakwater was extended in 1974, the lantern and lens from the earlier light were transferred to the new tower. The lighthouse guides vessels approaching the port of Rumoi, which is 0.8 kilometers away.

Why it matters: This lighthouse is important for maritime traffic entering and exiting the port of Rumoi, marking the end of the south breakwater and preventing collisions with its submerged extension.

Light & Optic

Characteristic Signature
Fl Red 3s
Flash Type
Flashing
Light Color
Red
Interval
3s
Raw Code
Fl R 3s
Focal Height
16m
Geographic Range
12.2NM

Construction & History

Year Built
1974
First Lit
1932

Significant events: The lantern and lens from the original light were transferred to the new tower when the breakwater was extended.

References & Identifiers

Nearest Port
Rumoi(0.8 km)
Admiralty No.
M6961
NGA No.
1276
ARLHS No.
JPN-955

Tower & Structure

Tower Height
14m
Tower Shape
cylindrical
Tower Color
red
Material
concrete

Structure: round cylindrical concrete tower with lantern and gallery

Location

City
Rumoi
Country
🇯🇵Japan
Region
Hokkaido Prefecture
Sea Region
Located at the end of the south breakwater of Rumoi.
Latitude
43.9631°
Longitude
141.6297°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Rumoi South Breakwater Lighthouse at night?+
Rumoi South Breakwater displays the characteristic Fl Red 3s. 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 Rumoi South Breakwater Lighthouse guide vessels into?+
Rumoi South Breakwater Lighthouse assists vessels approaching 5 nearby ports. The closest is Rumoi at 0.5 NM to the SSE. Other ports served include Mashike (8 NM SSW), Tomamae (21.3 NM N), Haboro (24.7 NM N), Yagishiri (30 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Rumoi South Breakwater Lighthouse still active and maintained?+
Yes, Rumoi South Breakwater 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 Rumoi South Breakwater Lighthouse?+
You can track vessels near Rumoi South Breakwater 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.