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Aleutians East Borough: Unimak Island Lighthouses Lighthouse

Fl White 6s🇺🇸USOperational

Location & Light Range

About Aleutians East Borough: Unimak Island Lighthouses Lighthouse

A square skeletal tower stands 8 meters tall on the southwestern coast of Unimak Island. Originally lit in 1903, the light's focal plane is 33.5 meters above sea level. The current steel structure, featuring an open lantern and gallery, replaced an earlier light destroyed by a tsunami in 1946. That event tragically claimed the lives of five crew members. The light emits a single white flash every 6 seconds and has a geographic range of 15.9 nautical miles. This station marks the southern entrance to Unimak Pass, a key route between the Pacific Ocean and the Bering Sea.

Why it matters: The light is essential for safe passage through Unimak Pass, a primary maritime gateway between the Pacific Ocean and the Bering Sea.

Light & Optic

Characteristic Signature
Fl White 6s
Flash Type
Flashing
Light Color
White
Interval
6s
Raw Code
Fl W 6s
Focal Height
33.5m
Geographic Range
15.9NM

Construction & History

First Lit
1903

Significant events: Destroyed by tsunami 1946, killing 5 crew members

Visiting

Open to public
No

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
8m
Tower Shape
square
Material
steel

Structure: square skeletal tower with an open lantern and gallery

Location

Country
🇺🇸United States
Region
Alaska
Sea Region
Located on the southwestern coast of Unimak Island marking the southern entrance to Unimak Pass, a principal route for vessels between the Pacific Ocean and Bering Sea.
Latitude
54.5985°
Longitude
-164.9270°

References & Identifiers

Nearest Port
Akutan(41.6 km)
Admiralty No.
G6912
ARLHS No.
ALK-016
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Frequently Asked Questions

How do mariners identify Aleutians East Borough: Unimak Island Lighthouses Lighthouse at night?+
Aleutians East Borough: Unimak Island Lighthouses displays the characteristic Fl White 6s. 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 white color may indicate a specific sector or warning zone.
Which ports and harbors does Aleutians East Borough: Unimak Island Lighthouses Lighthouse guide vessels into?+
Aleutians East Borough: Unimak Island Lighthouses Lighthouse assists vessels approaching 1 nearby port. The closest is AKUTAN at 41 NM to the SW. Mariners should consult the relevant chart for full approach and pilotage information.
Is Aleutians East Borough: Unimak Island Lighthouses Lighthouse still active and maintained?+
Yes, Aleutians East Borough: Unimak Island Lighthouses 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 Aleutians East Borough: Unimak Island Lighthouses Lighthouse?+
You can track vessels near Aleutians East Borough: Unimak Island Lighthouses 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.