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・ Special Lady
・ Special landscape area
・ Special law
・ Special law to redeem pro-Japanese collaborators' property
・ Special Leave Petitions in India
・ Special legislation
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・ Special library
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・ Special Limited Edition
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・ Special linear Lie algebra
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・ Special marine warning
Special mark
・ Special Marriage Act, 1954
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・ Special Measures for Gender Equality in The United Nations(UN)
・ Special member functions
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・ Special membership of the Commonwealth of Nations
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・ Special Messenger
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・ Special Milk Program
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Special mark : ウィキペディア英語版
Special mark

A Special Mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage. It is recognisable by its yellow colour and X, (often referred to as a St. Andrews Cross) top-mark. It has a distinctive sequence of various flashes that does not match any other navigational mark flashes in its vicinity.
==Purpose==
Special marks can indicate:
*Administrative areas
*Water skiing areas
*Anchorage areas
*Mooring areas
*Waiting areas
*Marine farms
*Oil wells
*Dead ends
*Pipelines
*Spoil ground (an area where dredged material is deposited)
*Historic wrecks
*Protected areas
*Outfall pipes (such as Stormwater, and Cooling water)
*Sewerage pipes
*Intake pipes
*Cables
*Power cables

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Special mark」の詳細全文を読む



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