Get the MarineRadar appSatellite AISSatellite live trackingTrack any shipLive alerts112,000+ ships trackedDownload free

Seoimal Lighthouse

Fl W 20s🇰🇷Masan and Geoje Area, KROperational

Location & Light Range

About Seoimal Lighthouse

Seoimal is a round, concrete post lighthouse with a white tower. It is operational and emits a white light. The light provides a flash characteristic of one white flash every 20 seconds. Its focal height reaches 120 meters above sea level. The structure is located in the Masan and Geoje Area.

Why it matters: This lighthouse has a geographic range of 27 nautical miles.

Light & Optic

Characteristic Signature
Fl W 20s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
20s
Raw Code
Fl.W. period 20s
Focal Height
120m
Geographic Range
27NM

Location

City
Masan and Geoje Area
Country
🇰🇷KR
Latitude
34.7867°
Longitude
128.7384°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Shape
round
Tower Color
white
Material
concrete

Structure: Post

References & Identifiers

Admiralty No.
M4336
NGA No.
16860
Live tracking · 50,000+ mariners

Find Seoimal Lighthouse on the live nautical map

Plan voyages near KR, see nearby vessels in real time, and explore 14,900+ navigation aids in the app.

Nautical mapNearby vesselsVoyage planning
Get the App

Frequently Asked Questions

How do mariners identify Seoimal Lighthouse at night?+
Seoimal displays the characteristic Fl W 20s — 1 white flash every 20 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 Seoimal Lighthouse guide vessels into?+
Seoimal Lighthouse assists vessels approaching 5 nearby ports. The closest is Okpo/Geoje at 6.3 NM to the NNW. Other ports served include Geoje (8.5 NM WNW), Gohyeon/Geoje (11.1 NM NW), Tongyeong (16.1 NM W), Busan New Port (17 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seoimal Lighthouse still active and maintained?+
Yes, Seoimal 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.
What shipping routes pass near Seoimal Lighthouse?+
Seoimal Lighthouse is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Seoimal Lighthouse?+
You can track vessels near Seoimal 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.