单项选择题
Vessels，（）support vessels，should not enter the safety zone of a deepwater port unless clearance has been obtained from the Vessel Traffic Supervisor.
A.besides B.excepted C.otherwise D.other than
单项选择题 The Rules state that vessels may depart from the Rules when（）.
单项选择题 Which statement about the Navigation Rules is TRUE?（）.
单项选择题 If a seaplane is not used as a means of transpiration on water but is capable of being used so，it shall（）.
