| 词条 | Derby Wharf Light |
| 释义 |
| name = Derby Wharf Light | image_name = Derby Wharf Lighthouse MA.JPG | caption = US Coast Guard photo | location = Salem, Massachusetts | coordinates = {{coord|42|30|59.6|N|70|53|0.9|W|region:US_type:landmark|display=inline,title}} | pushpin=lighthouse | pushpin_mapsize = 220px | pushpin_map = Massachusetts | coordinates_footnotes = | yearbuilt = 1871 | yearlit = 1871 | automated = 1970s | yeardeactivated = 1977 - 1983 | foundation = | construction = Brick | shape = Square | marking = White Black | height = | focalheight = {{convert|25|ft}} | lens = 5th order Fresnel lens 1871-1906 4th order 1906-1910 6th order 1910-1970s | currentlens = Solar-powered optic | intensity = | range = {{convert|4|nmi}} | characteristic = Fl R 6sec | fogsignal = none | admiralty = J0296 | NGA = | ARLHS = USA-224 | USCG =1-10129[1][2] |module={{Infobox NRHP | name =Derby Wharf Light Station | embed = yes | nrhp_type = | image = | caption = | area = | built =1877 | architect= Unknown | architecture= | added = June 15, 1987 | governing_body = National Park Service | mpsub=Lighthouses of Massachusetts TR | refnum=87001466[3] }} }} Derby Wharf Light Station is a historic lighthouse on Derby Wharf in Salem, Massachusetts that is within the Salem Maritime National Historic Site. It was built in 1871 and added to the National Register of Historic Places in 1987.[2][3] The United States Coast Guard Light List[1] description is "White square tower. Maintained by the U.S. Park Service". The actual light is {{convert|25|ft}} above Mean High Water. Its red light is visible for {{convert|4|nmi}}. HistoryThe Light Station was originally built in 1871 and used an oil lamp shining through a Fresnel lens. For many years, Derby Wharf Light had one of only 17 sixth-order Fresnel lenses in the United States. Today, the light is solar powered, and the light is a red flash every six seconds. See also
References1. ^1 {{cite uscgll|1|2010|83}} {{commonscat|Derby Wharf Lighthouse}}{{National Register of Historic Places in Massachusetts}}{{Lighthouses of Massachusetts}}{{EssexCountyMA-NRHP-stub}}{{US-lighthouse-stub}}2. ^1 {{cite uscghist|MA}} 3. ^1 {{NRISref|2008a}} 6 : Lighthouses completed in 1871|Towers completed in 1871|Buildings and structures in Salem, Massachusetts|Lighthouses on the National Register of Historic Places in Massachusetts|Lighthouses in Essex County, Massachusetts|National Register of Historic Places in Salem, Massachusetts |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。