单项选择题
A.holding its slops onboard until they can be pumped into the city sewer system
B.circulating them through the lube oil purifier to remove water and debris
C.holding its slops onboard until they can be discharged to a shore side reception facility
D.pumping them into a settling tank for separation before pumping the oily water residue overboard
单项选择题 At the earliest indication of fire aboard your vessel, you must FIRST（）.
单项选择题 The device used for preventing the passage of flames into enclosed spaces is called a （）.
单项选择题 Your vessel has run aground and upon taking fuel oil tank soundings, you find that a fuel tank level has increasedYou therefore should suspect （）.