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- Q373 - Navigation Problems: Chart Plot
3. At 1218, on 16 March, you are passing the Vicksburg Gage (mile 437.0 AHP). What has been the average current since 0630, 15 March, if you have been making turns for 8.0 mph?
The speed over ground was calculated as 9.2 mph, and subtracting the speed through the water (8.0 mph) yields an average following current of 1.2 mph.
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