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Cape Spencer Lighthouse

Fl W 10s🇺🇸Alaska, USOperational

Location & Light Range

About Cape Spencer Lighthouse

The Cape Spencer Lighthouse was constructed in 1925 and first lit the same year. The lighthouse features a white, cylindrical concrete tower standing 9 meters tall. Its focal height is 32 meters, providing a geographic range of 14 nautical miles. The light emits a white flash. The structure includes a square concrete keeper's quarters and fog signal building, with the tower centered on its roof. A solar-powered aerobeacon was installed in 1998.

Why it matters: This lighthouse is listed on the National Register of Historic Places.

Light & Optic

Characteristic Signature
Fl W 10s
Flash Type
Flashing
Light Color
White
Flash Count
1 flash
Interval
10s
Raw Code
Fl
Focal Height
32m
Geographic Range
14NM

Construction & History

Year Built
1925
Heritage Status
National Register of Historic Places listed place

References & Identifiers

Admiralty No.
LLNR 1070
USCG No.
6-1070
ARLHS No.
ALK-004
Wikipedia
Read on Wikipedia →
Wikidata
Q2656018 →
OpenStreetMap
View on OSM →

Tower & Structure

Tower Height
9m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Location

City
Alaska
Country
🇺🇸US
Latitude
58.1972°
Longitude
-136.6394°

Nearby Vessels

Flag
Type
Name
Dist.
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Frequently Asked Questions

How do mariners identify Cape Spencer Lighthouse at night?+
Cape Spencer displays the characteristic Fl W 10s — 1 white flash every 10 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 Cape Spencer Lighthouse guide vessels into?+
Cape Spencer Lighthouse assists vessels approaching 5 nearby ports. The closest is Pelican at 19.4 NM to the SE. Other ports served include Gustavus (30.9 NM ENE), Pleasant Island (33.1 NM ENE), HOONAH (38.1 NM E), Excursion Inlet (39.8 NM ENE). Mariners should consult the relevant chart for full approach and pilotage information.
Is Cape Spencer Lighthouse still active and maintained?+
Yes, Cape Spencer 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 Cape Spencer Lighthouse?+
You can track vessels near Cape Spencer 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.