单项选择题
A.sufficient facilities for the crew to wash their clothes
B.a wash basin in each room
C.separate toilet facilities for engineers where their number exceeds six
D.All of the above
单项选择题 Before sailing，mariners on duty shall check the headings of magnetic compass by comparison with（）.
单项选择题 At common law，the master，as agent of （），has the right to land or warehouse unclaimed goods.
单项选择题 As Chief Officer of a vessel underway，it comes to your attention that the vessel is，in some manner，unseaworthy. Under such circumstances the Master is required to take action upon receiving（）.