In IALA Region B, entering from sea, how...

🔍 Key Concepts

• IALA Region B buoyage system (red-right-returning in North and South America, Japan, Korea, and the Philippines) • Difference between lateral marks on the water vs. how they are drawn on charts (shape, color, and letter codes) • Meaning of chart symbols: colored shapes and single-letter labeling for aids to navigation

💭 Think About

• First, recall what color a port-side lateral mark is when you are entering from seaward in Region B and what its topmark/dayboard shape is. • Think about how that same buoy or daymark is represented on a paper chart: what color is the symbol and what geometric shape is used? • Consider what the single letter next to a lateral mark generally represents on a chart, and match that to the correct side and color.

✅ Before You Answer

• Verify the Region B rule for which side (port or starboard) is red vs. green when returning from sea. • Confirm the dayboard/daymark shape (square vs. triangular) used for port versus starboard lateral marks in Region B. • Check how a lateral mark is labeled on charts: the color indication (R or G) and how that matches the charted symbol’s shape and color.

In IALA Region B, entering from sea, how would a daymark on the port side of the channel be indicated on a chart?

A green square with the letter G

A red triangle with the letter R

A white square with the letters GR

A white triangle with the letters RG

🔍 Key Concepts

💭 Think About

✅ Before You Answer