单项选择题
A.The person who has done the planning
B.The master
C.The navigation officer
D.The owner
单项选择题 What is the direction of rotation of tropical cyclones,tropical storms and hurricanes in the Northern Hemisphere?（）
单项选择题 What is the requirement of a navigator who used an ECDIS?（）
单项选择题 If the rotation for this vessel is Felixstowe,Antwerp,Le Havre,Hamburg and Rotterdam.The container for Rotterdam is right at the（）of the heap.