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Alpena Harbor Light

 
Location: Entrance to Thunder Bay near Alpena, MI

Local Marine Forecast.

There are no active watches, warnings or advisories 

Latest Condiitions.

About Alpena Harbor Light

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The location of the light is Entrance to Thunder Bay. The nearest city is Alpena, MI. The station was first established in 1875. The current lighthouse was first lit in 1914.

The lighthouse is a red skeleton tower with the upper part enclosed.

The tower has a flashing red light at a focal plane height of 44 ft above mean high water. The light has a nominal range of 12 nautical miles. The tower height is 13 ft. The light has a period of 6 seconds.

Open to the Public?: No    Active?: Yes

Identification number: 7-11370 (U.S.)

To operate the fog signal, key the microphone on channel 83A VHF marine radio five times.
HORN: 1 blast ev 15s (2s bl)

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 6 second period, the light is on for less than 3 then off for more than 3.

Photo by: Jim Tracy
Source: USBeacons

Photo by: Jim Tracy
Source: USBeacons
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