
Leading Light (foaled 6 March 2010) is an Irish Thoroughbred racehorse. As a two-year-old he was well-beaten in his first race before winning a maiden race. In 2013 he established himself as a leading stayer, winning his first four races, including the Gallinule Stakes, the Queen`s Vase and the classic St Leger Stakes. As a four-year-old he won t....
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http://en.wikipedia.org/wiki/Leading_Light

Lights spaced by distance and height in such a way that when lined up provide a safe navigational bearing.
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http://www.diy-wood-boat.com/Boating-terms.html
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