单项选择题
A.she is not within a special area
B.she is within a special area
C.she has just departured from a special area
D.she is about to enter a special area
单项选择题 An oil tanker operating with dedicated clean ballast tanks shall be equipped with（），approved by the Administration on the basis of specification recommended by the Organization，to enable supervision of the oil content in ballast water being discharged.
单项选择题 Air gap is the vertical distance between the bottom of the hull and the（）.
单项选择题 According to regulations，access to a cargo pumproom in a tanker carrying grades C or D liquid cargo shall be（）.