When the Pilot is embarked he or she （）. ["relieves the Master of his duties","is solely responsible for the safe navigation of the vessel","is a specialist hired for his or her local navigational knowledge","relieves the officer of the watch"]
通常在实际规划中，密集城区和城区的天线挂高可规划为（）米，郊区（）米，农村（）米。
在救生艇筏上漂浮待救人员，防止低温效应的有效方法之一是（）。 ["不停的活动","脱掉衣服按摩身体","尽量多穿衣服"]
全向天线无法（）下倾，因此很高的全向站应该根据不同情况选择带不同角度的（）下倾天线。
When the movement of engine is no longer required the pilot usually gives the order like this（） . ["Stop engine","Nothing to port","Finish engines","Finished with engine"]
简述焦炉操作管理的要点有哪些？
