Oil may NOT be transferred unless（）.<br>A:there are two certificated tankermen on each vessel<br>B:the vessel is equipped with constant-tension winches<br>C:discharge containment equipment (i.e. drip pans) are in place<br>D:All of the above

Oil may NOT be transferred unless（）.
A:there are two certificated tankermen on each vessel
B:the vessel is equipped with constant-tension winches
C:discharge containment equipment (i.e. drip pans) are in place
D:All of the above

出自：海船船员证

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