单项选择题
A.Controlling access to the ship
B.Training and drills
C.Controlling the restrictedareas
D.Monitoring the ship at times
单项选择题 Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?（）
单项选择题 The standards of physical and medical fitness established by the Party shall not ensure that seafarers（）.
单项选择题 The maneuverability of the ship is considered（）if the following criteria are complied with.