How is AIS used on aids to navigation?
AIS transmitters can also be affixed to a floating or fixed aid to navigation (ATON), such as a buoy, beacon, or light. The AIS broadcast provides the position and purpose of an aid, such as a port or starboard lateral buoy, even before it is close enough to be visible from a ship or to provide a radar return. This can help mariners confirm their ship's position or to prepare to make a turn that is based on passing a particular aid.
Three types AIS ATONs
AIS ATONs on NOAA nautical charts are portrayed with a magenta circle, enclosing an ATON symbol. The same symbol is used to depict both real and synthetic AIS ATONs, with a magenta “AIS” label next to the circle. Virtual AIS ATONs have a “V-AIS” label. The table below shows examples of how non-AIS and AIS ATONs are shown on NOAA nautical charts.