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Semarang East Outer Breakwater Lighthouse

Fl Red 10s🇮🇩IDOperational

Location & Light Range

About Semarang East Outer Breakwater Lighthouse

Also known as: #Semarang East Outer Breakwater

This cylindrical fiberglass tower, painted red, stands 12 meters tall and emits a red flash every 10 seconds. Flared at the top, its total focal height reaches 14 meters, providing a geographic range of 11.6 nautical miles. Located at the west end of Semarang's detached east breakwater, the structure replaced an earlier light. The site is accessible by boat, though the tower itself is closed to the public.

Why it matters: This light marks the end of the east breakwater, defining the safe channel for vessels entering and exiting the port of Semarang.

Light & Optic

Characteristic Signature
Fl Red 10s
Flash Type
Flashing
Light Color
Red
Interval
10s
Raw Code
Fl R 10s
Focal Height
14m
Geographic Range
11.6NM

Construction & History

Significant events: replaced

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
12m
Tower Shape
cylindrical
Tower Color
red
Material
fiberglass

Structure: round red fiberglass tower, flared at the top

Location

Country
🇮🇩Indonesia
Region
Central Java
Sea Region
west end of the detached east breakwater, Semarang
Latitude
-6.9220°
Longitude
110.4234°

References & Identifiers

Nearest Port
Semarang(1.0 km)
Admiralty No.
Q1133.3
NGA No.
23557
ARLHS No.
IDO-040
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Frequently Asked Questions

How do mariners identify Semarang East Outer Breakwater Lighthouse at night?+
Semarang East Outer Breakwater displays the characteristic Fl Red 10s. 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 red color may indicate a specific sector or warning zone.
Which ports and harbors does Semarang East Outer Breakwater Lighthouse guide vessels into?+
Semarang East Outer Breakwater Lighthouse assists vessels approaching 3 nearby ports. The closest is Semarang at 1.6 NM to the S. Other ports served include Jepara (23.9 NM NE), Pekalongan, Java (43.3 NM W). Mariners should consult the relevant chart for full approach and pilotage information.
Is Semarang East Outer Breakwater Lighthouse still active and maintained?+
Yes, Semarang East Outer Breakwater 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 Semarang East Outer Breakwater Lighthouse?+
You can track vessels near Semarang East Outer Breakwater 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.