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
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（）.
An inert gas system on a tanker should be used to（）.
For the purposes of cargo oil containment，the fixed container under the manifold of an eight-inch loading line must hold a minimum of（）.
It is not necessary to declare（）in MARITIME HEALTH DECLARATION.
A jack-up drilling unit elevated on the Outer Continental Shelf must have a fog horn that will sound（）.
A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
A helmsman receives the command “Right 15 degrees rudder.”The helmsman’s IMMEDIATE reply should be（）.
Entries should be made in a Ro-Ro vessel’s cargo-securing device record book for（）.
A fire pump may be used for other purposes if（）.