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Ship John Shoal Light

 
Location: On a shoal in the Delaware River near Greenwich, NJ
Photo by: Jim Tracy
Source: USBeacons

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About Ship John Shoal Light

The location of the light is On a shoal in the Delaware River. The nearest city is Greenwich, NJ. The station was first established in 1854. The current lighthouse was first lit in 1877.

The lighthouse is a octagonal dwelling with pyramidal roof; on cylindrical pier.

The tower has a flashing white light at a focal plane height of 50 ft above mean high water. The light has a nominal range of 16 nautical miles. The tower height is 50 ft. The light has a period of 5 seconds.

Open to the Public?: No    Active?: Yes

Identification number: 1640 (U.S.)

Brown, octagonal dwelling with pyramidal roof; on cylindrical pier.

Red from 138 to 321.5, covers shoals on east channel. High intensity beam down Miah Maul Range. RACON: O ( ). Emergency light of lower intensity when main light is extinguished. HORN: 1 blast ev 15s (2s bl 13s si). Maintained from Mar. 15th to Dec. 15th.

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.

Ship John Shoal Light was listed on the National Register of Historic Places on July 19, 2006, reference number 06000630.

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