🔍 Key Concepts

• Intracoastal Waterway (ICW) markings that use yellow shapes on existing red/green lateral buoys • Meaning of a yellow square vs. yellow triangle on ICW aids to navigation • How the standard red-right-returning rule interacts with ICW yellow symbols when you are traveling southbound along the ICW

💭 Think About

• When you are traveling southbound along the ICW, which side are the ICW "preferred marks" on? Think about how yellow shapes help you treat that buoy for ICW purposes. • What does a yellow square tell you about which side to pass on when following the ICW, compared to a yellow triangle? • Does a yellow shape normally indicate end of the ICW, a charting error, or is it an intentional symbol with a specific lateral meaning for ICW traffic?

✅ Before You Answer

• Verify from an aids-to-navigation reference what yellow squares and yellow triangles mean on ICW buoys. • Confirm whether retro-reflective material is normally the same color as the yellow shapes, or if it is a different standard material/color. • Check which side (port or starboard) ICW marks with yellow squares should be kept on when proceeding in the ICW conventional direction (southbound or westbound).