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Sempu Lighthouse

Fl White 4s🇮🇩IDOperational

Location & Light Range

About Sempu Lighthouse

The Sempu Lighthouse is a square white skeletal tower 20 meters high, with its light situated 23 meters above sea level. It emits a white flash every 4 seconds, visible for 13.8 nautical miles. The lighthouse stands near the port of Probolinggo on Java, approximately 51.9 kilometers away. Its location on a promontory serves to guide vessels along the coast.

Why it matters: This lighthouse marks the entrance to a bay protected by Pulau Sempu, assisting ships with safe passage.

Light & Optic

Characteristic Signature
Fl White 4s
Flash Type
Flashing
Light Color
White
Interval
4s
Raw Code
Fl W 4s
Focal Height
23m
Geographic Range
13.8NM

Location

Country
🇮🇩ID
Latitude
-8.4173°
Longitude
112.7103°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
20m
Tower Shape
square
Tower Color
white

Structure: square white skeletal tower

References & Identifiers

Nearest Port
Probolinggo, Java(51.9 km)
Admiralty No.
Q1262
NGA No.
23821.2
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Frequently Asked Questions

How do mariners identify Sempu Lighthouse at night?+
Sempu displays the characteristic Fl White 4s. 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 Sempu Lighthouse guide vessels into?+
Sempu Lighthouse assists vessels approaching 2 nearby ports. The closest is Jawa Timur at 42.9 NM to the NNW. Other ports served include Pasuruan, Java (48.4 NM NNE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Sempu Lighthouse still active and maintained?+
Yes, Sempu 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.
How can I track vessels near Sempu Lighthouse?+
You can track vessels near Sempu 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.