A position obtained by applying only your vessel’s coures and speed to a known position is a（）.

A.walk the stern to starboard in reverse
B.walk the stern to port in reverse
C.run faster than a lefe-handed propeller
D.right itself if capsized

A.a heavy anchor with an extra long line used to anchor in deep water
B.a cone shaped bag used to slow down the wind drift effect
C.a padeye to which the sea painter is made fast
D.made of wood if it is an approved type

A.make underwater repairs to barges
B.determine if the air in a tank is safe for men
C.enter areas that may contain dangerous fumes or lack oxygen
D.resuacitate an unconscious person