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- Apprentice Mate Steersman (Western Rivers (Any Appropriate Tonnage)) »
- Q426 - Navigation Problems: Chart Plot
45. As you pass under the Natchez-Vidalia Dual Bridge, the gage on the bridge reads +3.6 feet. If the highest point on your vessel is 62 ft. above the water, what is your vertical clearance?
The bridge's published clearance is reduced by the river's stage above the reference level. Subtracting 3.6 feet from the published clearance of 64.0 feet yields a vertical clearance of 60.4 feet.
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