@clyde_boats_and_ships: We’ve probably all seen the red and green navigation markers, but this one is a Cardinal Mark. Cardinal Marks are used in conjunction with the compass to indicate the direction from the mark in which the deepest navigable water lies, to draw attention to a bend, junction or fork in a channel, or to mark the end of a shoal.Mariners will be safe if they pass north of a north mark, south of a south mark, east of an east mark and west of a west mark. Cardinal Marks are also used for permanent wreck marking whereby North, East, South and West Cardinal buoys are placed around the wreck. In the case of a new wreck, any one of the cardinal buoys may be duplicated and fixed with a Radar Beacon (RACON). In this case it is a north mark, so we are safe passing north of it. #navigation #mark #buoy #river #clyde

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Sunday 24 August 2025 19:27:52 GMT