🔍 Key Concepts

• IALA lateral buoyage system (Region B in the U.S.) • Difference between nun buoys and can buoys and their daymarks • Shape used on fixed aids (dayboards) that mark the starboard or port side of a channel

💭 Think About

• Think about what shape you see on fixed red aids to navigation marking the starboard side of a channel when returning from sea. • Recall the common phrase "red right returning" and picture not just the color, but the shape of the marker or dayboard. • Eliminate any shapes that you usually associate with warning, information, or special purpose marks rather than basic channel edges.

✅ Before You Answer

• Be sure you’re thinking about the lateral system only, not cardinal or special marks. • Confirm which daymark shape is used with red starboard-hand marks on fixed structures in Region B. • Verify that the shape you pick is commonly seen on channel edge markers, not hazard/warning signs.