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Guard Island Light

Location: Tongass Narrows Entrance / Clarence Strait near Ketchikan, AK

About Guard Island Light

The location of the light is Tongass Narrows Entrance / Clarence Strait. The nearest city is Ketchikan, AK. The station was first established in 1904. The current lighthouse was first lit in 1924.

The lighthouse is a white square tower on an oil house.

The tower has a flashing white light at a focal plane height of 74 ft above mean high water. The light has a nominal range of 17 nautical miles. The tower height is 34 ft. The light has a period of 10 seconds.

Open to the Public?: No    Active?: Yes

Identification number: 6-22300 (U.S.)

Construction began in the summer of 1903 but was halted for the winter. The light was completed and lit by September 1904. Classified as a minor light it had a fixed white fourth order lens. This was one of only three stations in Alaska where families were permitted to live. Improvements were made in 1922 when a reinforced concrete fog-signal building replaced the bell struck every 20 seconds by clock work machinery. The original bell tower was also improved and heightened. In 1938-39 a radio telephone and a radio beacon monitoring system were installed. In 1956 the radio beacon was modified for both marine and aircraft navigation. The station was automated in 1969.

Emergency light (Fl W 6s) of reduced intensity when main light is extinguished.

A 'flashing' light is a light in which the total duration of light in a period is shorter than the total duration of darkness and the appearances of light (flashes) are usually of equal duration. So in the 10 second period, the light is on for less than 5 then off for more than 5.

Guard Island Light was listed on the National Register of Historic Places on Jan. 14, 2004, reference number 03001378.

Today's Conditions on Site

Astronomical Info.

Astronomical Dawn: 5:50 am
Sunrise: 8:04 am
Sunset: 3:53 pm
Astronomical Dusk: 6:07 pm

Local Marine Forecast.

Small Craft Advisory 
Southeast Alaska Coastal Waters from Dixon Entrance to Cape Suckling out 100 NM Wind forecasts reflect the predominant speed and direction expected. Seas forecasts represent the average of the highest one-third of the combined windwave and swell height. ...SMALL CRAFT ADVISORY THROUGH LATE TONIGHT...

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