Study Topics
Boats in Action Section Quiz Site Map
Aids to Navigation

Other Aids - Miscellaneous

Mooring Bouys

Mooring buoys come in two different shapes; spherical and cylindrical. Both have white bodies with a solid blue
horizontal band on the center of the buoy. Mooring buoys may have a white reflector, or a white light attached to
them. Mooring buoys are the ONLY buoys to which you may legally tie your boat. Buoys are generally placed in
marked anchorage areas, and you must take caution if you are traveling near buoy areas. Check your state
boating guide for particular operating restrictions in anchorage areas.

Mooring Bouys
Mooring Bouys


These are pairs of unlighted or lighted fixed aids that when observed in line show the pilot to be on the
centerline of a channel.

Regulatory Marks

Regulatory Marks re designed to assist boaters by informing them of special restrictions or dangers that they
are approaching. Regulatory marks are white "can" buoys that have an orange shape on them. The mark will
give either a warning or instructions on how to proceed. The shape determines what type of mark it is.

  • An open diamond shape signifies danger.
  • A diamond with a cross in it signifies an exclusion area that you may not enter.
  • A circle indicates an upcoming operating restriction, such as a speed limit.
  • A square or rectangular shape is used for conveying instructions.