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Ko Prap Lighthouse

Fl W 5.5s🇹🇭Thailand, THOperational

Location & Light Range

About Ko Prap Lighthouse

Ko Prap is a white metal framework tower standing 46 meters tall. Its light emits a white flash every 6 seconds from a focal height of 74 meters. The structure provides a geographic range of 21 nautical miles. This lighthouse is part of the Thailand East Coast 338 navigational aid system.

Light & Optic

Characteristic Signature
Fl W 5.5s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
5.5s
Raw Code
Fl.W. period 6s
Focal Height
74m
Geographic Range
21NM

Location

City
Thailand
Country
🇹🇭TH
Latitude
9.2642°
Longitude
99.4323°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
46m
Tower Shape
round
Tower Color
white
Material
metal

Structure: White metal framework tower; 46. THAILAND-EAST COAST 338

References & Identifiers

Admiralty No.
F2916
NGA No.
20836
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Frequently Asked Questions

How do mariners identify Ko Prap Lighthouse at night?+
Ko Prap displays the characteristic Fl W 5.5s — 1 white flash every 5.5 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.
Which ports and harbors does Ko Prap Lighthouse guide vessels into?+
Ko Prap Lighthouse assists vessels approaching 5 nearby ports. The closest is Ban Don at 6.2 NM to the SW. Other ports served include Surat Thani (8 NM SW), Khanom (25.6 NM E), Nakhon Si Thammarat (25.8 NM E), Pak Phanang (27 NM E). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ko Prap Lighthouse still active and maintained?+
Yes, Ko Prap 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 Ko Prap Lighthouse?+
You can track vessels near Ko Prap 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.