单项选择题
Which statement is TRUE concerning the placard entitled Discharge of Oil Prohibited（）.
A.It is required on all vessels B.It may be located in a conspicuous place in the wheelhouse C.It may be located at the bilge and ballast pump control station D.All of the above
单项选择题 Which statement is FALSE concerning a tagline as used with a 30-ton pedestal crane（）.
单项选择题 Which statement comparing a shipboard crane to conventional gear is TRUE（）.
单项选择题 Which part provides for transverse control and positioning of a boom in a conventional yard and stay system（）.
