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- Q403 - Navigation Problems: Chart Plot
8. At 1019, on 10 March, you pass under the Greenville Bridge (mile 531.3 AHP). What was your average speed since departing River Cement Co. Dock?
Average speed is calculated by dividing the distance in statute miles between the River Cement Co. Dock and the Greenville Bridge by the elapsed time in hours, resulting in 7.2 mph.
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