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Deer Island Thorofare (Mark Island)

Location: Mark Island between Deer Island and Isle au Haut near Stonington, ME
Body of Water: Penobscot Bay

About Deer Island Thorofare (Mark Island)

The location of the light is Mark Island between Deer Island and Isle au Haut. The nearest city is Stonington, ME. The station was first established in 1857. The current lighthouse was first lit in 1858.

The lighthouse is a white and black tower.

The tower has a flashing white light at a focal plane height of 52 ft above mean high water. The light has a nominal range of 8 nautical miles. The tower height is 52 ft. The light has a period of 6 seconds.

Open to the Public?: No    Active?: Yes

Identification number: 1-3095 (U.S.)
Identification number: J0073 (International)

Obscured from 240 to 335. HORN: 1 blast ev 15s (2s bl). Operates continuously.

Deer Island Thorofare Light is also known as Mark Island Light. The light was automated in 1958. The keeper's house burned down in 1959 and the rest of the buildings were removed shortly thereafter.

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.

Today's Conditions on Site

Astronomical Info.

Astronomical Dawn: 5:24 am
Sunrise: 7:06 am
Sunset: 4:25 pm
Astronomical Dusk: 6:07 pm

Local Marine Forecast.

Small Craft Advisory is in effect until January 20 at 6:00PM EST by NWS
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EST THIS EVENING... * WINDS...Southwest 10 to 20 kt with gusts up to 30 kt. * SEAS...2 to 4 feet.

Additional Conditions.

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