Taking boating safety seriously? Subscribe to the BoatUS channel (http://www.youtube.com/BoatUSvideos) and get all the new tips delivered to you automatically. Navigation aids are designed to give you information by the way they look, their shape, color, whether they have lights on or not. Lateral marks are red or green and numbered. Red marks are triangular with even numbers on them. Green marks are squared and are on the left side of the waterways you're going up the stream. Mooring balls are white with blue stripe on them. These are the only buoys to which you may legally tie your boat. Regulatory marks give you specific information on what to do when you see them. Regulatory mark with a circle on it tells you that you're entering a controlled area such as a speed or no wake zone. To get the most out these marks you need to use nautical map - chart. Map helps you to keep track of where you are. In an emergency knowing where you are can make a difference between inconvenience and a tragedy. Like the feeling of safety and peace of mind? Get a Free Boat Insurance Quote http://www.boatus.com/insurance/