A.slipway
B.graving dock
C.ground warp
D.caisson dock
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A.a 2-second blast every 20 seconds
B.a 4-second blast every 20 seconds
C.an 8-second blast every 30 seconds
D.a 10-second blast every 30 seconds
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
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
最新試題
Please supply 200 tons of fresh water（）my ship.
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 fishing vessel displaying the lights shown is（）.
A safe fuel system must（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
It is not necessary to declare（）in MARITIME HEALTH DECLARATION.
All ships（）suspected infectious disease on board should radio information to Port Health Officer.
A large metallic device，mounted directly in the piping (usually located at the dock near the point where the vapor hose is attached)，designed to prevent the passage of a rapidly moving flame through the piping is called a（）.
An inert gas system on a tanker should be used to（）.
A helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be（）.