Solar Powered Cardinal Marker (West) In The Mersey ~
One of the most important functions of marine aids to navigation is to keep larger vessels or any boats that have deep draft out of shallow areas where they could run aground and be stranded !
Running aground has always been one of the greatest dangers to marine traffic and shipping, so consequently an elaborate system of channel markers has evolved to help boat operators and ship captains steer their vessels through the potentially treacherous waters that are usually found near land !
Channel markers make use of natural corridors of deep water, such as river beds and tidal cuts, as well as man-made canals and dredged deep water channels created for the purpose of navigation !
Thanks To Mia ~ Now Identified !
A cardinal mark is a sea mark (a buoy or other floating or fixed structure) used in maritime pilotage to indicate the position of a hazard and the direction of safe water.
Cardinal marks indicate the direction of safety as a cardinal (compass) direction (north, east, south or west) relative to the mark. This makes them meaningful regardless of the direction or position of the approaching vessel, in contrast to the (perhaps better-known) lateral mark system.
The characteristics and meanings of cardinal marks are as defined by the International Association of Lighthouse Authorities.
A cardinal mark indicates one of the four compass directions by:
the direction of its two conical top-marks, which can both point up, indicating north; down, indicating south; towards each other, indicating west; or away from each other, indicating east
its distinctive pattern of black and yellow stripes, which follows the orientation of the cones - the black stripe is in the position pointed to by the cones (eg at the top for a north cardinal, in the middle for a west cardinal)
optionally, its distinctive sequence of flashing light, which consists of a sequence of quick or very quick flashes whose number gives the clockface position which corresponds to the direction of the cardinal (eg three for an east cardinal, nine for a west; north has continuous flashes, and south may be augmented with a long flash, to help distinguish it from a west in difficult conditions)
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