阿摩線上測驗
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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統計： A(61), B(72), C(405), D(46), E(0) #3155825
統計： A(61), B(72), C(405), D(46), E(0) #3155825
