Hannan Ko Lighthouse

Hannan Ko Lighthouse is a maritime navigation aid located in Seto Naikai Eastern, JP. It is currently listed as inactive and may no longer emit a light signal. The light sits at a focal height of 13 meters above mean sea level. Under standard atmospheric conditions, the light is visible up to 5 nautical miles (approximately 9.3 km) from the observer.

Light characteristic: The identifying signal of this lighthouse is Fl (2) R 5s. This means the light produces 2 flashes every 5 seconds. Mariners use this distinctive pattern to positively identify the light and distinguish it from other aids to navigation in the area. The light color is red, which may indicate a specific sector or warning zone.

Visibility and range: With a focal height of 13 meters and a nominal range of 5 nautical miles, this light serves as a local navigation aid for vessels operating in nearshore waters. While its range is limited, it provides essential guidance for coastal traffic, fishing vessels, and smaller craft in the immediate area.

Position: Hannan Ko Lighthouse is positioned at 34.4231°N, 135.3103°E, near Seto Naikai Eastern in JP. The blue circle on the map represents the nominal 5-nautical-mile range of the light.

Geographic context: Hannan Ko Lighthouse is situated on the Sea of Japan, within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. The location falls within the subtropical climate zone with mild winters and warm summers.

Nearby lighthouses in JP: Other lighthouses in the region include Abashiri East Breakwater, Abashiri Island Breakwater North End, Abashiri North Breakwater, Abashiri South Breakwater East End, Abuka Kō. View all on the Lighthouses Directory.