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During the day, the lights may not easily be seen and therefore leading lights are often fitted with secondary visual aids, e.g. large red flags with wide black lines running down them. When both red flags and black lines line up, the navigator knows that the vessel is on the correct bearing. The
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Two lights are positioned near one another. One, called the front light, is lower than the one behind, which is called the rear light. At night when viewed from a ship, the two lights only become aligned vertically when a vessel is positioned on the correct bearing.
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that can be used for safe navigation. The beacons consist of two lights that are separated in distance and elevation, so that when they are aligned, with one above the other, they provide a bearing. Range lights are often illuminated day and night.
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Leading lights are sometimes designed to be movable, allowing their position to be shifted in the event of a change in the safe channel; these include one at
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to indicate a safe passage for vessels entering a shallow or dangerous channel; they may also be used for
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American lighthouses : a comprehensive guide to exploring our national coastal treasures
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Light List, Volume I, Atlantic Coast, St. Croix River, Maine to
Shrewsbury River, New Jersey
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449:(2004 ed.). Bethesda, Md.: Paradise Cay Publications. p. 64.
428:"Dictionary of the International Association of Lighthouse Authorities"
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Leading lights were used in Great
Britain as early as 1763 to mark the
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The port of
Hamburg, with plans, charts and numerous illustrations
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The
American practical navigator : an epitome of navigation
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Roberts, Bruce; Shelton-Roberts, Cheryl; Jones, Ray (2012).
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structures are usually painted to make them more prominent.
268:, predecessor to the Nantucket Harbor Range shown above.
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to the sea, using successive pairs of leading lights.
526:(3rd ed.). Guilford, Conn.: Globe Pequot Press.
474:. Hamburg: Meissner & Christiansen. p. 204.
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in the UK. The beacons may be artificial or natural.
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67:. Unsourced material may be challenged and removed.
196:are unlighted, in which case they are known as a
928:International Lighthouse and Lightship Weekend
245:were privately established by subscription at
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8:
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127:Learn how and when to remove this message
493:Robinson, John; Robinson, Diane (2007).
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241:. The first set of range lights in the
159:A pair of leading lights in Bremerhaven
332:Marking the approach to the island of
300:The twelve standard dayboards used on
176:, are a pair of light beacons used in
184:. At night, the lights are a form of
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890:Lighthouses by century of completion
65:adding citations to reliable sources
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895:Lighthouses by year of completion
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923:Amateur Radio Lighthouse Society
885:Lighthouses by heritage register
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379:Visual approach slope indicator
222:Some major rivers, such as the
52:needs additional citations for
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318:Margaree Harbour, Nova Scotia
144:Nantucket Harbor Range Lights
913:General lighthouse authority
495:Lighthouses of Liverpool Bay
445:Bowditch, Nathaniel (2002).
608:Conservation of lighthouses
286:Doubling Point Range Lights
258:Hilton Head, South Carolina
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470:Wendemuth, Ludwig (1927).
200:in the United States or a
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414:United States Coast Guard
150:are type KRW, see below.
30:For the racehorse, see
742:Automatic lamp changer
603:History of lighthouses
192:In some cases the two
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558:at Wikimedia Commons
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782:Light characteristic
681:Navigational purpose
416:. 2009. p. 135.
288:on NOAA chart 13296.
61:improve this article
1014:Maritime signalling
880:Lighthouse builders
356:Engineering portal
247:Newburyport Harbor
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1004:Navigational aids
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934:Lighthouse Digest
747:Bird-cage lantern
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554:Media related to
499:The History Press
239:Port of Liverpool
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27:Navigational tool
16:(Redirected from
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78: –
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72:Find sources:
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50:This article
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44:
39:
38:
33:
32:Leading Light
19:
932:
813:Pharologists
772:Lens lantern
767:Fresnel lens
703:Sector light
692:
629:Construction
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385:Inogon light
369:Sector light
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186:leading line
170:range lights
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59:Please help
54:verification
51:
18:Range lights
1009:Lighthouses
983:WikiProject
796:Maintenance
757:Dalén light
752:Carcel lamp
737:Argand lamp
592:Lighthouses
998:Categories
973:Wiktionary
873:Categories
839:Antarctica
808:Light dues
777:Lewis lamp
732:Aerobeacon
661:Screw-pile
391:References
264:, and the
224:Elbe River
178:navigation
87:newspapers
827:Locations
480:586327105
336:, Finland
253:in 1788.
210:Operation
148:dayboards
953:Category
725:Fixtures
698:Sea mark
673:(acting)
651:Integral
342:See also
117:May 2012
963:Commons
859:Oceania
803:Keepers
762:Foghorn
688:Daymark
641:Caisson
613:Museums
364:Daymark
304:ranges.
272:Gallery
232:Hamburg
228:Germany
203:transit
194:beacons
172:in the
101:scholar
904:Global
849:Europe
834:Africa
818:Tender
787:VRB-25
671:Vessel
636:Aerial
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622:Types
410:(PDF)
334:Seili
198:range
108:JSTOR
94:books
844:Asia
656:Pile
646:Crib
528:ISBN
503:ISBN
476:OCLC
451:ISBN
302:USCG
146:The
80:news
249:in
226:in
63:by
1000::
501:.
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430:.
584:e
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124:(
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115:(
105:·
98:·
91:·
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57:.
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20:)
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