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- Apprentice Mate Steersman (Western Rivers (Any Appropriate Tonnage)) »
- Q426 - Navigation Problems: Chart Plot
21. The following questions (1-10) are based on the Army Corps of Engineers Mississippi River Maps (Cairo to the Gulf) and the Light List.
AHP = Above Head of Passes
LMR = Lower Mississippi River
UMR = Upper Mississippi River
OHR = Ohio River
ACOE = Army Corps of Engineers
At 0519 on 23 May, you get underway from Baton Rouge, LA, (mile 231.8 AHP) bound for Louisville, KY, (mile 610.1 OR). What is the length of the trip?
The trip length is calculated by subtracting the starting mile marker from the ending mile marker on the Mississippi River, then adding the Ohio River distance to Louisville. Baton Rouge (231.8 AHP) to the Ohio River mouth (953.8 AHP) is 722.0 miles, and the Ohio River distance to Louisville (610.1 OR) is 610.1 miles, totaling 1332.1 miles.
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