Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Cosmo Sekiyu Seaberth Lighthouse

Fl (3) White 12s🇯🇵Ichihara, JPOperational

Location & Light Range

About Cosmo Sekiyu Seaberth Lighthouse

This white, cylindrical steel tower stands 20 meters tall and is located on the wharf of the Cosmo oil refinery in Ichihara, Chiba Prefecture. Its light is visible from 14.3 nautical miles and produces three white flashes every 12 seconds. The skeletal tower has a focal height of 25 meters. It is situated 1.8 kilometers from the nearest port, Ichihara, and is not accessible to the public due to its operational nature within the industrial zone.

Why it matters: This light is essential for the safe navigation of oil tankers approaching and departing the Cosmo oil refinery's seaberth, warning mariners of the wharf's location to prevent collisions.

Light & Optic

Characteristic Signature
Fl (3) White 12s
Flash Type
Flashing
Light Color
White
Flash Count
3 flashes
Interval
12s
Raw Code
Fl(3) W 12s
Focal Height
25m
Geographic Range
14.3NM

Location

City
Ichihara
Country
🇯🇵Japan
Region
Chiba Prefecture
Sea Region
Located on the wharf of the Cosmo oil refinery.
Latitude
35.5384°
Longitude
140.0562°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
20m
Tower Shape
cylindrical
Tower Color
white
Material
steel

Structure: square cylindrical white skeletal tower

References & Identifiers

Nearest Port
Ichihara(1.8 km)
Admiralty No.
M6434.5
NGA No.
5320
Live tracking · 50,000+ mariners

Find Cosmo Sekiyu Seaberth Lighthouse on the live nautical map

Plan voyages near Japan, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Cosmo Sekiyu Seaberth Lighthouse at night?+
Cosmo Sekiyu Seaberth displays the characteristic Fl (3) White 12s — 3 white flashes every 12 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Cosmo Sekiyu Seaberth Lighthouse guide vessels into?+
Cosmo Sekiyu Seaberth Lighthouse assists vessels approaching 5 nearby ports. The closest is Ichihara at 2.1 NM to the E. Other ports served include Anegasaki (3.2 NM SSW), Chiba (4.1 NM NE), Narashino (6 NM N), Tsuna (8.5 NM NNW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Cosmo Sekiyu Seaberth Lighthouse still active and maintained?+
Yes, Cosmo Sekiyu Seaberth 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 Cosmo Sekiyu Seaberth Lighthouse?+
Cosmo Sekiyu Seaberth 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 Cosmo Sekiyu Seaberth Lighthouse?+
You can track vessels near Cosmo Sekiyu Seaberth 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.