A.When the towing vessel enters the fog
B.When the drilling rig enters the fog
C.When the towing vessel can no longer be seen from the rig
D.Immediately
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A.under tow
B.fixed to the seabed
C.underway
D.All of the above
A.destination
B.answer
C.time
D.ending
A.The motion of the apparent sun is along the ecliptic
B.Measurement of time is along the celestial equator
C.The speed of the Earth's revolution is not constant
D.There are variations in the Earth's rotational speed
A.Mine Safety Appliance Association
B.American Chemical Society
C.Marine Chemists Association
D.National Fire Protection Association
A.can be absorbed through the skin
B.causes irreversible damage to eye tissue
C.is a very unstable product
D.All of the above
最新試題
The Coast Radio Stations are found in（）.
An inflatable liferaft should be manually released from its cradle by（）.
For details of these and other lights the larger scale charts and Admiralty Lists should be （）.
After launching，an inflatable raft should be kept dry inside by（）.
A person who sees someone fall overboard should（）.
After being rescued from the vessel accident，the people agreed that they had much to（）.
A sweep oar is an oar that is（）.
Important changes to charts and lights（including temporary ones），radio signals and sailing directions are listed in（）.
Before personnel are lifted from a vessel in a personnel basket，the vessel should be（）.
The latest known details of lights are given in（）.