The Graves Light
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| The Graves Light | |
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| Location: | Offshore Boston, Massachusetts |
| Coordinates WGS-84 (GPS) |
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| Year first lit: | 1905 |
| Automated: | 1972 |
| Foundation: | Granite |
| Construction: | Granite Block |
| Tower shape: | Conical |
| Height: | 113 feet, 98 feet above sea level |
| Original lens: | first-order Fresnel lens |
| Range: | 15 nm |
| Characteristic: | Two white flashes every 12 seconds (0.1s on, 1.8s off, 0.1s on, 10s off). Emergency light of reduced intensity when main light is extinguished. HORN: 2 blasts ev 20s (2s bl-2s si-2s bl-14s si). |
The Graves Light is a lighthouse located on The Graves, the outermost island of the Boston Harbor Islands National Recreation Area, and some 11 miles offshore of downtown Boston, Massachusetts, USA. At 113 feet tall, it is the tallest lighthouse in the approaches to the Port of Boston, and is an important navigation aid for traffic to and from the port.[1]
The lighthouse was built in 1905, to a conical design using granite blocks on a granite foundation, and equipped with a first-order Fresnel lens. Operated by the United States Coast Guard, the light was automated in 1972 and has a signature of two white flashes every 12 seconds.[2][3]
[edit] See also
[edit] References
- ^ The Graves Factsheet. Boston Harbor Islands Partnership. Retrieved on August 3, 2006.
- ^ Historic Light Station Information & Photography - Massachusetts. United States Coast Guard. Retrieved on August 5, 2006.
- ^ Graves Lighthouse, Boston Harbor, Massachusetts. www.lighthouse.cc. Retrieved on August 5, 2006.
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