Just like you see different types of road signs when traveling in a car, boating has its own signs for safe operation. The marker system helps inform boaters which way to travel, what water hazards exist and speed limits among other things. The markers shown here are not all the markers used, but are among the most common. MARKER MATCH-UP As Ahoy sees each of the blank buoys (markers), read what they tell Ahoy and click on the marker which best matches the marker Ahoy sees.