If the pitch of the propeller is 19.7 feet, and the revolutions per day are 86,178, calculate the day's run allowing 3% negative slip.

Correct Answer: Option D — 287.6 miles

Theoretical distance: (86,178 * 19.7) / 6076.1 = 279.3 miles. With 3% negative slip, the vessel travels further than the theoretical distance. 279.3 * (1 - (-0.03)) = 279.3 * 1.03 = 287.6 miles. This accounts for the increased speed relative to the propeller's rotation.