Navigational aid
（重定向自Navigation aid）
![A lighthouse is an easily recognized aid to navigation.](/Images/godic/202501/29/NobskaLight0752.jpg")
![Diagram showing lateral, non-lateral, and special purpose markers as seen on a IALA Region B nautical chart.](/Images/godic/202501/29/ATON_-_Road_Signs_of_the_Waterway0752.png")
![Triangle shaped lead marks with lights.](/Images/godic/202501/29/Navigation_leading_markers_and_lights0752.JPG")
![large buoy in storage, Homer, Alaska](/Images/godic/202501/29/Bigbuoy0752.jpg")
A navigational aid (also known as aid to navigation, ATON, or navaid) is any sort of marker which aids the traveler in navigation; the term is most commonly used to refer to nautical or aviation travel. Common types of such aids include lighthouses, buoys, fog signals, and day beacons.