The following questions (1-10) are based on...

Question 1 of 29218fork_d02cb34f03704dd7b74

The following questions (1-10) are based on the Army Corps of Engineers Mississippi River Maps (Cairo to the Gulf) and the Light List.

On 3 January, you get underway from Morganza, LA, (mile 278.3 AHP) enroute to the Eagle Marine Docks, LDB, in St. Louis.

What is the length of the trip?

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Question 1 of 29218

The following questions (1-10) are based on the Army Corps of Engineers Mississippi River Maps (Cairo to the Gulf) and the Light List.

On 3 January, you get underway from Morganza, LA, (mile 278.3 AHP) enroute to the Eagle Marine Docks, LDB, in St. Louis.

What is the length of the trip?

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🔍 Key Concepts

• Use the ACOE Mississippi River Maps (Cairo to the Gulf) to find how miles are measured on the Lower Mississippi River (AHP) and how they change at Cairo for the Upper Mississippi River (UMR). • Use the Light List to locate Eagle Marine Docks, LDB, St. Louis and determine its river mile designation and which river reach (UMR vs LMR) it’s on. • Remember that the starting point at Morganza, LA (mile 278.3 AHP) is measured Above Head of Passes, and you may need to combine distances from different mileage systems.

💭 Think About

• First, determine the river mile for Eagle Marine Docks from the Light List or map index, and note whether it is given in UMR miles or AHP miles. • Then, identify the river mile at Cairo and understand how mileage transitions between AHP and UMR at that point. • Think about whether the total trip length is a simple subtraction of two mile marks, or if it requires adding together distances from two different river segments (e.g., Lower Mississippi segment plus Upper Mississippi segment).

✅ Before You Answer

• Verify the exact mile marker for Eagle Marine Docks, LDB, St. Louis, in the Light List or map legend. • Confirm the mile at Cairo in both systems and how the charts show the change from AHP to UMR numbering. • Before choosing an answer, double-check that you have added or subtracted miles using consistent units and segments (don’t mix AHP and UMR without converting properly).