A.turn off all lights that interfere with the navigation lights
B.turn on all available working lights on deck
C.ring the bell rapidly for five seconds once a minute
D.display two black diamonds in a vertical line during the day
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A.Aye Aye Sir
B.Right 15 degrees rudder
C.Rudder is right 15 degrees
D.No reply is necessary，just carry out the order
A.heavy-walled drill pipe
B.tool joint
C.down hole tool
D.drill collar
A.main brace
B.tow span
C.jockey bar
D.None of the above
A.one sidelight
B.one sidelight and a masthead light
C.one sidelight and two masthead lights
D.both sidelights of a vessel and her masthead light(s)
A.vernier
B.psychrometer
C.hygrometer
D.stadimeter
最新試題
Permanent magnetism is caused by（）.
A green buoy has a yellow triangle on it. This is a(n)（）.
Permanent magnetism is found in（）.
A helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be（）.
A flooded leg on a liftboat would adversely affect the vessel’s stability underway by（）.
A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.
A heavy，thick-walled tube，usually steel，used between the drill pipe and the bit in the drill stem to weight the bit in order to improve its performance is called a（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
An inert gas system installed on a tanker is designed to（）.