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One Fathom Bank Lighthouse

Fl White 20s🇲🇾MYOperational

Location & Light Range

About One Fathom Bank Lighthouse

Also known as: One Fathom Bank (Permatang Sedepa)

One Fathom Bank Lighthouse, a 43-meter cylindrical steel tower, stands with its red and white horizontal bands in the waters of the Malacca Strait. Its construction in 1999 replaced earlier structures on this site that had guided mariners since 1852. The tower's design includes a lantern and triple gallery, rising from a dome-shaped equipment shelter atop a circular platform supported by pilings. This lighthouse emits a single white flash every 20 seconds, visible for 17.6 nautical miles. The site is open to the public, though the tower itself remains closed.

Why it matters: This lighthouse warns ships of the submerged One Fathom Bank, a hazard within the busy Malacca Strait. It also guides vessels approaching Port Klang, a major Southeast Asian port.

Light & Optic

Characteristic Signature
Fl White 20s
Flash Type
Flashing
Light Color
White
Interval
20s
Raw Code
Fl W 20s
Focal Height
43m
Geographic Range
17.6NM

Construction & History

Year Built
1999

Significant events: station established 1852, original lighthouse replaced 1874, inactive since 1999, restored 2004-05, featured on 2004 postage stamp

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
43m
Tower Shape
cylindrical
Tower Color
with red and white horizontal bands
Material
steel

Structure: round cylindrical steel tower with lantern and triple gallery, rising from the center of a dome-shaped equipment shelter, mounted on a circular platform supported by pilings

Location

Country
🇲🇾Malaysia
Region
Selangor
Latitude
2.8885°
Longitude
100.9930°

References & Identifiers

Nearest Port
Port klang(22.2 km)
Admiralty No.
F1616
NGA No.
21784
ARLHS No.
WMA-007
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Frequently Asked Questions

How do mariners identify One Fathom Bank Lighthouse at night?+
One Fathom Bank displays the characteristic Fl White 20s. 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 One Fathom Bank Lighthouse guide vessels into?+
One Fathom Bank Lighthouse assists vessels approaching 5 nearby ports. The closest is Pulau Indah at 19.6 NM to the E. Other ports served include Port Klang (Pelabuhan Klang) (22.7 NM ENE), Port Klang (Ferry Port) (23.7 NM ENE), Northport/Pt Klang (25.3 NM ENE), Kuala Selangor (26.9 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is One Fathom Bank Lighthouse still active and maintained?+
Yes, One Fathom Bank 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 One Fathom Bank Lighthouse?+
One Fathom Bank Lighthouse is located within the Strait of Malacca — the primary shipping route between the Indian and Pacific Oceans, carrying over 25% of global traded goods. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near One Fathom Bank Lighthouse?+
You can track vessels near One Fathom Bank 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.