17.當船舶從事拖曳作業時，依國際海上避碰規則定義，則該船屬下列何種船舶？
(A)Vessel not under command.
(B)Vessel restricted in her ability to maneuver.
(C)Vessel constrained by her draught.
(D)Vessel is not under way.

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統計： A(3), B(11), C(0), D(0), E(0) #2401173