As you approach Walnut Point Light (mile...

🔍 Key Concepts

• Lateral buoyage system on the Western Rivers and how green vs red aids are shaped and numbered • How daymarks on fixed structures match the color/shape system used on buoys in that same waterway • Meaning of "AHP (Above Head of Passes)" and how that confirms you are on the Western Rivers system

💭 Think About

• Ask yourself: On the Western Rivers, when you are proceeding upstream, which side are the green aids on, and what is their typical shape (square or triangle)? • Think about fixed lights along the bank: their dayboards/daymarks follow the same color/shape rules as the nearby channel markers—what color and shape would you expect on the side you are on at mile 522.5 AHP? • Eliminate any options that don’t match the standard IALA-B shape convention for lateral marks in U.S. inland waters (green vs red and square vs triangle)

✅ Before You Answer

• Verify which side of the channel Walnut Point Light is on and whether that side is marked by green (port) or red (starboard) when going upstream on Western Rivers • Confirm in your notes which shapes (square vs triangle) are used for green vs red lateral marks in U.S. inland waters • Double‑check that diamonds are or are not standard shapes for normal lateral daymarks in the U.S. system; if they are unusual, consider crossing those options off first

As you approach Walnut Point Light (mile 522.5 AHP), which type of daymark would you see on the light structure?

Green diamond

Green square

Red triangle

Red diamond

🔍 Key Concepts

💭 Think About

✅ Before You Answer