You are turning 85 RPM, with a propeller pitch of 19 feet, and an estimated slip of +3%. What is the speed of advance?

Correct Answer: Option D — 15.5 knots

Calculate speed of advance using: Speed = ((RPM * Pitch * 60) / 6080) * (1 - Slip). With 85 RPM, 19 feet pitch, and 3% slip (0.97), the calculation (85 * 19 * 60 / 6080) * 0.97 results in 15.5 knots. This reflects the actual vessel speed after accounting for propeller slip.