page_title: Isolated danger mark
hierarchical_section_title: Isolated danger mark
caption_attribution_description: English: Isolated danger mark in IALA system. Polski: Znak odosobnione niebezpieczeństwo w systemie IALA.
context_page_description: 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.
  It is recognisable by its black and red bands and top-mark of two black balls.
  Its distinctive sequence of flashing white light consists of 2 quick flashes in intervals of either 5 or 10 seconds.
context_section_description: 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.
  It is recognisable by its black and red bands and top-mark of two black balls.
  Its distinctive sequence of flashing white light consists of 2 quick flashes in intervals of either 5 or 10 seconds.
caption: Examples of Isolated Danger Marks
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