🔍 Key Concepts

• IALA Maritime Buoyage System lateral marks vs. special marks • Color and shape conventions for special purpose marks • Difference between standard green/red lateral daymarks and special daymarks

💭 Think About

• Look at which option does NOT match the normal colors and shapes used for standard lateral aids to navigation (red right returning, green left). Which one looks like it might indicate a special purpose instead of channel sides? • Think about what color is commonly used for ‘special’ aids (not marking the main channel but things like cables, spoil areas, or recreational zones). Which choice uses that color in a way that stands out? • Consider which shapes (square, triangle, diamond, etc.) are normally associated with port and starboard daymarks. Which option breaks that normal pattern?

✅ Before You Answer

• Identify which color is typically associated with special purpose marks in the buoyage system • Eliminate the options that clearly match normal lateral system daymarks (red/green for port/starboard sides of channels) • Confirm which option includes a feature that is unique to marks indicating special areas or special functions, not basic channel edges