Your vessel arrives in port with sufficient fuel to steam 595 miles at 14 knots. If you are unable to take on bunkers, at what speed must you proceed to reach your next port, 707 miles distant?

Correct Answer: Option D — 12.8 knots

Fuel consumption rate follows the cubic law relative to vessel speed. By applying $V_2 = V_1 \times \sqrt[3]{D_1 / D_2}$, using 14 knots multiplied by the cube root of 595 divided by 707, the required economical speed computes precisely to 12.8 knots.