page_title: Navigational aid
section_title: Other markers
hierarchical_section_title: Navigational aid / Other markers
caption_attribution_description: English: Aids to Navigation — Road Signs of the Waterway (Visual Buoyage)
context_page_description: A navigational aid, also known as aid to navigation, is any sort of marker which aids the traveler in navigation, usually nautical or aviation travel. Common types of such aids include lighthouses, buoys, fog signals, and day beacons.
context_section_description: There are also other markers that give information other than the edges of safe waters. Most are white with orange markings and black lettering. They are used to give direction and information, warn of hazards and destructions, mark controlled areas, and mark off-limits areas. These ATONs do not mark traffic channels.
  On non-lateral markers, there are some shapes that show certain things:
  Squares
  show information, including places to find food, supplies, and repairs. They sometimes show directions.
  Diamonds
  warn about dangers like rocks, construction, dams, or stumps.
  Circles
  mark a controlled area such as no wake, idles speed, speed limit, or ski zone.
  Crossed diamonds
  show areas off limits to all boats, like swimming areas and dams.
caption: Diagram showing lateral, non-lateral, and special purpose markers as seen on an IALA Region B nautical chart.
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