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

Seo Sudo Lighthouse

Fl R 6s🇰🇷Incheon Area, KROperational

Location & Light Range

About Seo Sudo Lighthouse

This red beacon stands 36 meters tall, with its focal plane situated 17 meters above sea level. It emits a single red flash every 6 seconds. The structure is topped with a marker and is further identified by an Automatic Identification System (AIS) and a Radar Transponder Beacon (RACON). The lighthouse operates with a geographic range of 8 nautical miles.

Why it matters: Designated as STARBOARD under the IALA B system, this light marks a specific navigational channel.

Light & Optic

Characteristic Signature
Fl R 6s
Flash Type
Flashing
Light Color
Red
Flash Count
1 flash
Interval
6s
Raw Code
Fl.R. period 6s
Focal Height
17m
Geographic Range
8NM

Location

City
Incheon Area
Country
🇰🇷KR
Latitude
37.3284°
Longitude
126.3917°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
36m
Tower Color
red

Structure: STARBOARD (IALA B) Red beacon, topmark; 36. AIS (MMSI No 994401038). RACON K(– • –)

References & Identifiers

Admiralty No.
M4165
NGA No.
17954
Live tracking · 50,000+ mariners

Find Seo Sudo 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 Seo Sudo Lighthouse at night?+
Seo Sudo displays the characteristic Fl R 6s — 1 red flash every 6 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. The red color may indicate a specific sector or warning zone.
Which ports and harbors does Seo Sudo Lighthouse guide vessels into?+
Seo Sudo Lighthouse assists vessels approaching 5 nearby ports. The closest is Incheon at 7.9 NM to the NE. Other ports served include Gyeongin (15.8 NM NE), DANGJIN (16.9 NM SSE), Daesan/Seosan (18.8 NM S), BUCHEON (20 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Seo Sudo Lighthouse still active and maintained?+
Yes, Seo Sudo 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 Seo Sudo Lighthouse?+
You can track vessels near Seo Sudo 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.