Every injury aboard a commercial vessel must be reported to the（）.

A.loss of life
B.an injury requiring only first aid
C.property damage
D.loss of equipment which doesn't reduce the vessel's maneuverability

A.increase body heat
B.preserve body heat
C.avoid self-inflicted wounds caused by spastic movement
D.protect the person from injury during transportation

A.the wounded had nothing wrong with his head
B.the injury was not serous
C.the injury happened at the mast head
D.a sailor injured at his head