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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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