The observed noon to noon run for a 24 hour period is 489 miles. The average RPM for the day was 95. The pitch of the wheel is 22.5 feet. What is the slip of the wheel?

Correct Answer: Option D — +3.4%

Engine distance: (95 * 1440 * 22.5) / 6076.1 = 506.6 miles. Slip: (506.6 - 489) / 506.6 = 0.0347, or +3.4%. This calculation follows standard maritime practice for determining propeller efficiency, where positive slip represents the difference between theoretical and observed distance over a 24-hour period.