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Ong Do Lighthouse

Fl W 15s🇰🇷Incheon Area, KROperational

Location & Light Range

About Ong Do Lighthouse

This white, round concrete tower stands 82 meters high with a focal plane of 75 meters. Its light emits a single white flash every 15 seconds. The structure also includes a foghorn that sounds a single blast lasting 3 seconds every 43 seconds. It is equipped with AIS, identified by MMSI number 994402651.

Why it matters: The lighthouse provides a visible range of 26 nautical miles.

Light & Optic

Characteristic Signature
Fl W 15s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
15s
Raw Code
Fl.W. period 15s
Focal Height
75m
Geographic Range
26NM

Location

City
Incheon Area
Country
🇰🇷KR
Latitude
36.6500°
Longitude
126.0170°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
82m
Tower Shape
round
Tower Color
white
Material
concrete

Structure: White round concrete tower; 82. AIS (MMSI No 994402651). Horn: 1bl. ev. 43s (bl. 3s, si

References & Identifiers

Admiralty No.
M4154
NGA No.
17840
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Frequently Asked Questions

How do mariners identify Ong Do Lighthouse at night?+
Ong Do displays the characteristic Fl W 15s — 1 white flash every 15 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 Ong Do Lighthouse guide vessels into?+
Ong Do Lighthouse assists vessels approaching 5 nearby ports. The closest is Taean-gun at 19.3 NM to the NNE. Other ports served include Boryeong (26.9 NM SE), Daesan/Seosan (28.1 NM NE), Daecheon (30.7 NM SE), DANGJIN (34.3 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Ong Do Lighthouse still active and maintained?+
Yes, Ong Do 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 Ong Do Lighthouse?+
You can track vessels near Ong Do 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.