19. Which of the following vessels is a not under command vessel?
(A) A vessel engaged in dredging.
(B) A vessel engaged in the launching of aircraft.
(C) A vessel with failure of her steering gear.
(D) A vessel engaged in a towing operation.
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題目解析 本題的關鍵在於理解「不受指揮...
阿摩線上測驗
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