If the pitch of the propeller is 21.2 feet, and the revolutions per day are 93,660, calculate the day's run allowing 5% positive slip.

Correct Answer: Option A — 310.3 miles

Theoretical distance: (93,660 * 21.2) / 6076.1 = 326.7 miles. With 5% positive slip, the vessel travels less than the theoretical distance. 326.7 * (1 - 0.05) = 326.7 * 0.95 = 310.3 miles. This reflects the standard loss of efficiency in propeller propulsion.