单项选择题
A.In master's cabin B.In third office's cabin C.In a break-glass-type enclosure conspicuously located adjacent to the room D.In a locked locker conspicuously located adjacent to the room
A.hold your course and speed B.sound the danger signal C.begin an exchange of passing signals D.do not cross the channel if you might impede the other vessel
A.displacement B.fumigation C.discharging D.compensation