When preparing a ship for heavy weather，fuel oil day tanks should be（）.<br>A:pumped overboard to calm the seas<br>B:drained to the lower hull to reduce free surfaces<br>C:filled to ensure that sufficient fuel oil is available during a lengthy emergency<br>D:partially drained to increase free surfaces in order to reduce motions

When preparing a ship for heavy weather，fuel oil day tanks should be（）.
A:pumped overboard to calm the seas
B:drained to the lower hull to reduce free surfaces
C:filled to ensure that sufficient fuel oil is available during a lengthy emergency
D:partially drained to increase free surfaces in order to reduce motions

出自：海船船员证

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