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Prongs Reef Lighthouse

Fl White 10s🇮🇳INOperational

Location & Light Range

About Prongs Reef Lighthouse

Also known as: Prongs Reef (Colaba Point)

Prongs Reef Lighthouse, built in 1874, is a 44-meter cylindrical stone tower painted black. It is situated on a stone pier approximately 2.5 kilometers south of Colaba Point, marking the entrance to Mumbai Harbour. The structure features a lantern and two galleries. In its early history, a cannon was mounted at the lighthouse to deter pirates. The light emits a single white flash every 10 seconds, with a geographic range of 17.2 nautical miles. Prongs Reef is about 6.4 kilometers from the nearest port, Mumbai.

Why it matters: This lighthouse guides maritime traffic into Mumbai Harbour. It is one of the few offshore lighthouses globally that remains staffed.

Light & Optic

Characteristic Signature
Fl White 10s
Flash Type
Flashing
Light Color
White
Interval
10s
Raw Code
Fl W 10s
Focal Height
41m
Geographic Range
17.2NM

Construction & History

Year Built
1874

Significant events: equipped with a cannon to repel pirates

References & Identifiers

Nearest Port
Mumbai(6.4 km)
Admiralty No.
F0514
NGA No.
27952
ARLHS No.
IND-007

Tower & Structure

Tower Height
44m
Tower Shape
cylindrical
Tower Color
black
Material
stone

Structure: round tapered stone tower with lantern and two galleries, mounted on a stone pier

Location

Country
🇮🇳India
Sea Region
entrance to Mumbai Harbour, about 2.5 km south of Colaba Point, the southernmost point of Salsette Island
Latitude
18.8791°
Longitude
72.7997°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Prongs Reef Lighthouse at night?+
Prongs Reef displays the characteristic Fl White 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Prongs Reef Lighthouse guide vessels into?+
Prongs Reef Lighthouse assists vessels approaching 5 nearby ports. The closest is Mumbai (ex Bombay) at 4.9 NM to the NE. Other ports served include Uran (7.6 NM E), Karanja (9.1 NM ESE), Nhava Sheva (Jawaharlal Nehru) (9.5 NM ENE), Nhave (10.4 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Prongs Reef Lighthouse still active and maintained?+
Yes, Prongs Reef 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 Prongs Reef Lighthouse?+
You can track vessels near Prongs Reef 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.