A.In times of heavy weather, it is extremely dangerous if a seaman is not enough tall
B.In times of heavy weather, it is extremely dangerous if a crew is very short
C.In case of bad weather, it is particularly dangerous if there is a shortage in personnel
D.In case of bad weather, it is particularly dangerous if there are enough personnel
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A.should not be carried out during the watches
B.can only be carried out in port
C.is a kind of maintenances carried out prior to the occurrence
D.is a kind of maintenances carried out after the occurrence
A.to provide for safe practices in ship operation and a safe working environment
B.to establish safeguards against all identified risks
C.to continuously improve safety management skills of personnel, including preparing for emergencies
D.all the above
A.the ship owner
B.any person who has assumed responsibility for operating the ship
C.either A or B
D.neither A nor B
A.the manager of the shipping company
B.the master of the ship
C.the designated person on board ship
D.the designated person ashore
A.The control equipment
B.The power unit
C.The transmission system
D.The follow-up mechanism
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（） is not installed on the main switchboar.
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