Your vessel arrives in port with sufficient fuel to steam 812 miles at 15 knots. If you are unable to take on bunkers, at what speed must you proceed to reach your next port, 928 miles distant?

Correct Answer: Option A — 14.0 knots

Use the fuel consumption formula: (D1 / D2) = (V2^2 / V1^2) or simply distance/speed ratios. Since fuel is constant, the relationship between distance and speed is proportional to the square of the speed. Solving for the new speed required to cover 928 miles yields 14.0 knots.