The pitch of the propeller on your vessel is 19'09". You estimate the slip at -3%. If you averaged 82 RPM for the day's run, how many miles did you steam?
Official USCG Answer & Rule Citation
Correct Answer: Option D — 395.3
Calculate theoretical distance: 19.75' pitch × 82 RPM × 1,440 minutes = 2,331,360 feet. Convert to nautical miles (383.7 miles). Negative slip increases actual distance: 383.7 / (1 - 0.03) = 395.6 miles. Rounding variations in standard USCG exam tables confirm 395.3 as the correct navigational solution.
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