单项选择题 Place on deck, in mess rooms,etc.,assigned to crew and passengers, where they have to meet according to the muster list when the corresponding alarm is released or announcement made means（）.

单项选择题 Public address system: loudspeakers in the vessel’s cabins, mess rooms, ETC., and on deck via which important information can bebroadcast from a central point, mostly from the navigation bridge defines（）.

单项选择题 The speed at which a storm centre moves is the（）.