41. 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

On the 10th of May at 1130, you leave the fleeting area at Gartness Lt mile 227.8 (AHP) bound for the Monsanto Terminal in St. Louis mile 178.0 (UMR). Your engines turn for 8.5 mph in still water. What is the length of the trip?

The total trip distance is calculated by determining the distance from Gartness Light to Cairo on the Lower Mississippi River and then the distance from Cairo to the Monsanto Terminal on the Upper Mississippi River. The distance from Gartness Light to Cairo is found by subtracting Gartness Light's mile marker (227.8 AHP) from Cairo's mile marker (953.8 AHP), resulting in 726.0 miles. The distance from Cairo to the Monsanto Terminal is 178.0 miles. Adding these two distances yields a total trip length of 904.0 miles.