Vessels having main engines arranged for air starting are to be provided with at least （）<br>A:one automatic drain serving both containers<br>B:two air starting containers of approximately equal size<br>C:one control air container and one starting air container<br>D:one additional means of starting the main engine

Vessels having main engines arranged for air starting are to be provided with at least （）
A:one automatic drain serving both containers
B:two air starting containers of approximately equal size
C:one control air container and one starting air container
D:one additional means of starting the main engine

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