单选题When the machinery spaces are in the periodic unmanned condition, shall be immediately available and on call to attend the machinery space（）.Athe chief engineerBthe designated engineer from shipyardCthe designated duty officer in charge of the engineering watchDthe designated surveyor from classification society
单选题
When the machinery spaces are in the periodic unmanned condition, shall be immediately available and on call to attend the machinery space（）.
A
the chief engineer
B
the designated engineer from shipyard
C
the designated duty officer in charge of the engineering watch
D
the designated surveyor from classification society
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