🔍 Key Concepts

• Types of dayboards and night markings used on the Western Rivers System • How lights on river mile markers correspond to shapes and colors of aids to navigation • Difference between channel mark shapes: square vs. triangle, and their usual color meanings

💭 Think About

• Think about which side of the channel you would normally find Kate Aubrey Towhead Light on when going upbound on the Mississippi River and what color that side uses. • Match that side’s color to the usual dayboard shape (square or triangle) used on river aids to navigation. • Consider whether special banded or diamond-shaped marks are typically used for main river channel lights, or if they’re more often standard lateral marks.

✅ Before You Answer

• Verify whether upbound Western Rivers use green or red for the left or right descending bank, and what shapes go with each. • Confirm if banded or diamond marks are usually used for hazards/special purpose rather than simple channel edge marking. • Check an Inland River navigation chart or Light List entry for Kate Aubrey Towhead Light to see the side of channel and corresponding standard mark type.