Editing Sector light (section)

== Examples of sector lights ==
[[File:Admiralty Chart No 3032 Rauna to Tananger, Published 1970 cropped Kolnesholmane.jpg|thumb|The sector light of Kolnesholmane as shown on a 1970 nautical chart]]
[[File:Flørauden seamark and its light characteristics.png|thumb|The sector light of Flørauden as shown on OpenSeaMap]]
An example of a sector light is the light of the [[Fisgard Lighthouse National Historic Site|Fisgard Lighthouse]] in [[British Columbia]]. The lighthouse was built to guide ships through the entrance of Esquimalt harbour. The white sector is an isophase light of 2s from 322° to 195°. If the ship sees this white light, it can pass safely. The rest shows a red light from 195 to 322°. If a vessel sees this light, it should alter its course.

Another example is the [[PEL sector light]] at [[Diego Garcia]]. The PEL sector light was constructed to guide US Navy vessels into the Diego Garcia port through a narrow entrance in the lagoon.<ref>{{Cite web|url = http://www.msc.navy.mil/sealift/2003/March/diegogarcia.htm|title = US Navy Military Sealift Command|access-date = 2016-02-09|archive-date = 2016-03-07|archive-url = https://web.archive.org/web/20160307092940/http://www.msc.navy.mil/sealift/2003/March/diegogarcia.htm|url-status = dead}}</ref> The PEL sector light produces 3.5 million candela and is visible for 10 nautical miles (18.5&nbsp;km) by day. The beam with 3 colors is narrow at 1.6°.<ref>{{Cite web|url = http://vega.co.nz/price-list/gallery/case-study-diego-garcia/|title = PEL-6 Diego Garcia|access-date = 2016-02-09|archive-date = 2016-02-15|archive-url = https://web.archive.org/web/20160215144927/http://www.vega.co.nz/price-list/gallery/case-study-diego-garcia/|url-status = dead}}</ref> This was required because the PEL sector light was built over 7NM (13&nbsp;km) from the atoll entrance and it had to illuminate a safe entrance which is only 228 meters wide.

A more complex example is Kolnesholmane, on the southern approach to Risavika in SW [[Norway]]. This has multiple white green and red sectors, indicating safe passage from several directions.