As you pass Solitude Lt. (mile 249.0 AHP)...

🔍 Key Concepts

• U.S. Aids to Navigation System on Western Rivers (shapes and colors of dayboards) • Meaning of red vs green aids when proceeding upstream (Against the current) on the Mississippi/Western Rivers: "Red Right Returning" and how that applies to river mileage AHP (Above Head of Passes) • Difference in shapes used for preferred channel and lateral marks on rivers: square vs triangle vs diamond

💭 Think About

• Think about whether mile markers labeled AHP (Above Head of Passes) are generally counted going upstream or downstream on the Mississippi River • Once you know the upstream direction, apply "Red Right Returning" to decide which color should be on the vessel’s starboard side as you pass the light upstream • Recall which shape (square, triangle, diamond) is normally used for standard lateral dayboards on rivers, and which shapes indicate junction/preferred channel marks instead

✅ Before You Answer

• Verify whether AHP river miles increase in the upstream direction on the Mississippi River • Confirm which side of the channel the red aids and green aids are on when traveling upstream on Western Rivers • Check which combinations of color + shape are normally paired together for standard lateral marks (not junction or preferred-channel marks) on river dayboards

As you pass Solitude Lt. (mile 249.0 AHP) which dayboard would you see?

Green diamond

Green square

Red diamond

Red triangle

🔍 Key Concepts

💭 Think About

✅ Before You Answer