🔍 Key Concepts

• Intracoastal Waterway (ICW) markings and how they are shown on standard lateral buoys • Meaning of yellow triangles vs yellow squares on ICW aids that are also part of the regular red/green buoyage system • Difference between lateral buoys and information/regulatory buoys in the U.S. Aids to Navigation System

💭 Think About

• Ask yourself: on a normal red nun buoy, what does the red color and shape already tell you about the channel? Then, what extra information does a yellow triangle add specifically for ICW traffic? • Think about whether geometric symbols (triangles/squares) ever replace letters and numbers, or if they are added to existing aids for an additional purpose. • Consider what type of buoys are used to mark information or regulations (speed, no wake, exclusions). Do they look like nuns/cans, or do they have a different standard shape and color pattern?

✅ Before You Answer

• Verify what a yellow triangle means for vessels following the ICW southbound vs northbound. • Confirm what shapes and colors are used for regulatory/information buoys (are they red? nun-shaped? do they carry letters/numbers the same way?). • Check whether yellow geometric symbols indicate a coincidence of two navigation systems (ICW plus standard lateral system) rather than special channel bends or turns.