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Sector lights are a man-made pilotage and position fixing aid that indicates a safe channel through shallow or dangerous waters.

Generally, there are three lights of different colours, each identifying a sector:

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Topics: Sector Lights, Sector Wide Approach, Sector Model...

SectorIn mathematics ( geometry), a sector is the "pie shaped" area of part of a circle enclosed by two radii and an arc. In the context of computer hardware, a sector is a sub-division of a track of a magnetic hard disk or optical disc. A sector stores a fixed	Sector lightsSector lights are a man-made pilotage and position fixing aid that indicates a safe channel through shallow or dangerous waters. Generally, there are three lights of different colours, each identifying a sector: white this sector is inside the safe channe	Sector-Wide ApproachSector-Wide Approach (SWAp is "a method of working that brings together governments, donors and other stakeholders within any sector. It is characterized by a set of operating principles rather than a specific package of policies or activities. The approa
Sector modelProposed in 1939 by economist Homer Hoyt, the sector model in urban land use and demography modified the concentric zone model of city development. While accepting the existence of a central business district, Hoyt suggested that various groups expand out	Sector (Star Trek)In the fictional Star Trek universe, a Sector is an area of space, usually designated by a series of numbers to indicate its location in the galaxy. Overview of Galactic Sectors The United Federation of Planets (UFP) set up the current sector designation