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Dangsa Hang Lighthouse

Fl (2) Green 6s🇰🇷Ulsan, KROperational

Location & Light Range

About Dangsa Hang Lighthouse

This white cylindrical concrete tower, topped in black, stands 10 meters tall on the south breakwater of Dangsa harbor. Its focal height reaches 13 meters above sea level. The lighthouse emits a green light, flashing once every 6 seconds. This navigational aid has a geographic range of 11.3 nautical miles. The site is accessible to the public, offering views of the structure and the surrounding harbor, though the tower itself is closed to visitors.

Why it matters: The lighthouse is essential for guiding vessels into and out of Dangsa harbor, marking the navigable channel on the south breakwater.

Light & Optic

Characteristic Signature
Fl (2) Green 6s
Flash Type
Flashing
Light Color
Green
Flash Count
2 flashes
Interval
6s
Raw Code
Fl G 6s
Focal Height
13m
Geographic Range
11.3NM

Location

City
Ulsan
Country
🇰🇷South Korea
Sea Region
south breakwater of Dangsa harbor, South Korea
Latitude
35.5837°
Longitude
129.4569°

References & Identifiers

Nearest Port
Ulsan(6.5 km)
Admiralty No.
M4397.2.
NGA No.
M4397.2

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
white with a black top
Material
concrete

Structure: octagonal cylindrical white concrete tower with a mushroom top

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Dangsa Hang Lighthouse at night?+
Dangsa Hang displays the characteristic Fl (2) Green 6s — 2 green flashes 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 green color may indicate a specific sector or warning zone.
Which ports and harbors does Dangsa Hang Lighthouse guide vessels into?+
Dangsa Hang Lighthouse assists vessels approaching 5 nearby ports. The closest is Mipo/Ulsan at 4.2 NM to the SSW. Other ports served include Ulsan (5.7 NM SW), Onsan/Ulsan (9.9 NM SSW), Guryongpo (24.4 NM N), Pohang (26.1 NM N). Mariners should consult the relevant chart for full approach and pilotage information.
Is Dangsa Hang Lighthouse still active and maintained?+
Yes, Dangsa Hang 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 Dangsa Hang Lighthouse?+
Dangsa Hang 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 Dangsa Hang Lighthouse?+
You can track vessels near Dangsa Hang 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.