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Thomas Point Shoal Light

 
Location: off Thomas Point at the mouth of the South River in the Chesapeake Bay near Annapolis, MD

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About Thomas Point Shoal Light

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The location of the light is off Thomas Point at the mouth of the South River in the Chesapeake Bay. The nearest city is Annapolis, MD. The station was first established in 1825. The current lighthouse was first lit in 1875.

The lighthouse is a white hexagonal tower on piles.

The tower has a flashing white light at a focal plane height of 43 ft above mean high water. The light has a nominal range of 16 nautical miles. The light has a period of 5 seconds.

Open to the Public?: Yes    Active?: Yes

Identification number: 2-7760 (U.S.)

Red sectors from 011 to 051.5 and 096.5 to 202. Light range through the red sectors is 11nm. The light was automated in 1986.

The light was designated a National Historic Landmark on January 20, 1999.

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 5 second period, the light is on for less than 2.5 then off for more than 2.5.

Thomas Point Shoal Light was listed on the National Register of Historic Places on Feb. 20, 1975, reference number 75000864.

NOTE: Sectors of colored glass are placed in the lanterns of some lights in order to produce a system of light sectors of different colors. In general, red sectors are used to mark shoals or to warn the mariner of other obstructions to navigation or of nearby land. Such lights provide approximate bearing information, since observers may note the change of color as they cross the boundary between sectors.
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