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 large basin cut into the shore，closed off by a caisson，and used for dry docking of ships is known as a（）.
It is not necessary to declare（）in the Health List.
A head-on situation at night is one in which you see dead ahead a vessel showing（）.
A fishing vessel displaying the lights shown is（）.
Cargo transfer operations on a tank vessel need NOT be stopped when（）.
An obstruction on a helodeck is any object that might present a hazard to the（）.
A fishing vessel casualty must be reported to the Coast Guard if it involves（）.
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.
A heavy steel curved arch constructed athwartships and above the after deck on a towing vessel is sometimes called a（）.
A fire is discovered in the bow of your vessel while making way. The wind is from ahead at 35 knots. You should（）.