試題詳解

5. Vessels are only permitted to discharge sewage en route subject to certain circumstances specified by Resolution II MARPOL IV where vessels should maintain a speed of _____ while discharging sewage.
(A) Not less than 3 knots.
(B) Not less than 4 knots.
(C)Not less than 6 knots.
(D) Not less than 7 knots.