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Haterumashima Lighthouse

Iso W 6s🇯🇵Nansei Shoto, JPInactive

Location & Light Range

About Haterumashima Lighthouse

This white, cylindrical fiberglass tower stands 26 meters high. Its focal plane is 70 meters above sea level. The lighthouse emits an isophase white light, completing a full cycle every 6 seconds. It has a geographic range of 12 nautical miles. The structure is built from glass-reinforced plastic.

Light & Optic

Characteristic Signature
Iso W 6s
Flash Type
Isophase
Light Color
White
Flash Count
1 flash
Interval
6s
Raw Code
Iso.W. period 6s
Focal Height
70m
Light Range
12NM (22.2 km)
Geographic Range
12NM

Location

City
Nansei Shoto
Country
🇯🇵JP
Latitude
24.0575°
Longitude
123.7855°

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
26m
Tower Shape
cylindrical
Tower Color
white
Material
fiberglass

Structure: White cylindrical glass reinforced plastic(grp) fiberglass tower; 26

References & Identifiers

Admiralty No.
M4735
NGA No.
13568
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Frequently Asked Questions

How far offshore can Haterumashima Lighthouse be seen?+
With a focal height of 70 meters and a nominal range of 12 nautical miles (approximately 22.2 km), Haterumashima is visible from well offshore under standard atmospheric conditions. Actual visibility depends on observer height, weather, and sea state. This range makes it a significant coastal navigation aid for vessels transiting the area.
How do mariners identify Haterumashima Lighthouse at night?+
Haterumashima displays the characteristic Iso W 6s — 1 white 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.
Which ports and harbors does Haterumashima Lighthouse guide vessels into?+
Haterumashima Lighthouse assists vessels approaching 4 nearby ports. The closest is Kohama at 19.8 NM to the NNE. Other ports served include Funaura (21 NM N), Hatoma (24.6 NM N), Ishigaki (26.4 NM NE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Haterumashima Lighthouse still active and maintained?+
Haterumashima Lighthouse is currently listed as inactive. It may have been decommissioned, replaced by a different navigation aid, or temporarily taken out of service. Mariners should check the latest Notices to Mariners for current status.
How can I track vessels near Haterumashima Lighthouse?+
You can track vessels near Haterumashima 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.