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Uoturi Saki Lighthouse

Fl W 4s🇯🇵Nagasaki Area, JPOperational

Location & Light Range

About Uoturi Saki Lighthouse

This navigational aid is a red concrete tower situated on piles. It features a topmark and emits a white flash every 3 seconds. The focal height reaches 58 meters, providing a geographic range of 7 nautical miles. The structure's design is specific to the starboard side as per IALA B standards.

Light & Optic

Characteristic Signature
Fl W 4s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W. period 3s
Focal Height
58m
Geographic Range
7NM

Location

City
Nagasaki Area
Country
🇯🇵JP
Latitude
33.8436°
Longitude
129.7705°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Color
red
Material
concrete

Structure: STARBOARD (IALA B) Red concrete tower, topmark, on piles

References & Identifiers

Admiralty No.
M5260.4
NGA No.
12664
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Frequently Asked Questions

How do mariners identify Uoturi Saki Lighthouse at night?+
Uoturi Saki displays the characteristic Fl 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 Uoturi Saki Lighthouse guide vessels into?+
Uoturi Saki Lighthouse assists vessels approaching 5 nearby ports. The closest is Ashibe at 2.2 NM to the SSW. Other ports served include Katsumoto (4 NM WNW), Yobuko (19.1 NM SSE), Tobo (23.1 NM SSE), Karatsu (23.7 NM SSE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Uoturi Saki Lighthouse still active and maintained?+
Yes, Uoturi Saki 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 Uoturi Saki Lighthouse?+
Uoturi Saki 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 Uoturi Saki Lighthouse?+
You can track vessels near Uoturi Saki 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.