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
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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.