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Tsuma Lighthouse

F W 4s🇯🇵Shimane, JPOperational

Location & Light Range

About Tsuma Lighthouse

This lighthouse features a 13-meter quadrilateral latticed tower painted white and red. A red rectangular daymark with white banding is present on the structure. Its light emits a green flash every 4 seconds. The focal height reaches 100 meters, providing a geographic range of 3 nautical miles.

Light & Optic

Characteristic Signature
F W 4s
Flash Type
Fixed
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.G. period 4s
Focal Height
100m
Geographic Range
3NM

Location

City
Shimane
Country
🇯🇵JP
Latitude
36.1896°
Longitude
133.2273°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
13m
Tower Shape
quadrilateral
Tower Color
white and red
Material
fiberglass

Structure: Quadrilateral latticed tower, red rectangular daymark white banded; 13

References & Identifiers

Admiralty No.
M7321.5
NGA No.
2080
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Frequently Asked Questions

How do mariners identify Tsuma Lighthouse at night?+
Tsuma displays the characteristic F 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 Tsuma Lighthouse guide vessels into?+
Tsuma Lighthouse assists vessels approaching 5 nearby ports. The closest is Oki at 5.5 NM to the ENE. Other ports served include Ama, Hyogo (8.5 NM SW), Chichii (8.6 NM SW), Nakanoshima (8.9 NM SW), Minami (9.5 NM SW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Tsuma Lighthouse still active and maintained?+
Yes, Tsuma 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 Tsuma Lighthouse?+
Tsuma 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 Tsuma Lighthouse?+
You can track vessels near Tsuma 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.