🔍 Key Concepts

• Intracoastal Waterway (ICW) markings and how they differ from standard lateral buoys • Meaning of a yellow square vs a yellow triangle on ICW aids to navigation • ‘Red, right, returning’ and how it applies when you are moving southbound on the ICW

💭 Think About

• Think about what the yellow square is telling you specifically about the ICW route, not just about night visibility. • Consider how the ICW overlays the normal green/red buoyage system. Does the yellow square change how you pass the buoy, or only identify its role in the ICW? • Ask yourself: when traveling south on the ICW, which side are ICW ‘preferred’ markers indicated to be kept on?

✅ Before You Answer

• Verify from the ICW marking system what a yellow square means on a buoy or dayboard. • Check whether retro-reflective material is normally yellow squares or separate reflective strips/panels. • Confirm whether any single buoy would normally be used to indicate the end of the ICW in that area.