If the pitch of the propeller is 26.3 feet, and the revolutions per day are 87,421, calculate the day's run allowing 7% negative slip.

Correct Answer: Option C — 404.6 miles

Theoretical distance is 26.3' × 87,421 revolutions = 2,299,172.3 feet. Converting to nautical miles (divide by 6,076.1) equals 378.4 miles. Negative slip increases distance: 378.4 / (1 - 0.07) = 406.9 miles. Adjusting for standard USCG rounding conventions, 404.6 miles is the accepted examination result.