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Pulau Sumabawa Lighthouse

Fl W 4s🇮🇩Northern Sumatra, IDOperational

Location & Light Range

About Pulau Sumabawa Lighthouse

Pulau Sumabawa is a white skeletal metal tower standing 98 meters tall. Its focal plane is 33 meters above sea level, providing a geographic range of 16 nautical miles. The lighthouse emits a white flash every 4 seconds. A radar reflector is also part of its structure. This light is located off the coast of Northern Sumatra, on a small island approximately 15 kilometers from the southeast coast of Nias.

Light & Optic

Characteristic Signature
Fl W 4s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
4s
Raw Code
Fl.W. period 4s
Focal Height
33m
Geographic Range
16NM

Location

City
Northern Sumatra
Country
🇮🇩ID
Latitude
0.9117°
Longitude
98.0188°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
98m
Tower Shape
skeletal
Tower Color
white
Material
metal

Structure: White metal framework tower; 98. Radar reflector

References & Identifiers

Admiralty No.
F1257
NGA No.
23246
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Frequently Asked Questions

How do mariners identify Pulau Sumabawa Lighthouse at night?+
Pulau Sumabawa 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.
Is Pulau Sumabawa Lighthouse still active and maintained?+
Yes, Pulau Sumabawa 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 Pulau Sumabawa Lighthouse?+
Pulau Sumabawa 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 Pulau Sumabawa Lighthouse?+
You can track vessels near Pulau Sumabawa 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.