单选题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.Aforward perpendicularBamidshipsClongitudinal center of floatationDafter perpendicular
单选题
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.
A
forward perpendicular
B
amidships
C
longitudinal center of floatation
D
after perpendicular
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