Isolated danger mark

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Examples of Isolated Danger Marks

An Isolated Danger Mark, as defined by the International Association of Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate a hazard to shipping such as a partially submerged rock.Template:Sfn

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Isolated Danger Mark near Hvar, Croatia

It is recognisable by its black and red bands and top-mark of two black balls.Template:Sfn

Its distinctive sequence of flashing white light consists of 2 quick flashes in intervals of either 5 or 10 seconds.Template:Sfn

See also

• Navigation
• Lateral mark
• Cardinal mark
• Safe water mark
• Special mark
• Emergency wreck buoy