单项选择题 In any case the draught of the vessel at the（）shall not be less than that which is necessary to obtain full immersion of the propeller.

单项选择题 In a transversely framed ship，the transverse frames are supported by all of the following EXCEPT（）.

单项选择题 In a longitudinally-framed ship，the longitudinal frames are held in place and supported by athwartship members called（）.