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
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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
A.dump valve
B.deflector
C.separator
D.diverter
A.poor fix
B.good fix
C.poor signal quality
D.good signal quality
A.on an even keel
B.listing about 1° to the side the light is displayed on
C.listing over 5° With the light displayed on the high side
D.listing，and the chutes should be directed to the side where the light is displayed
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To predict the actual depth of water using the Tide Tables，the number obtained from the Tide Tables is（）.
An orange flag showing a black circle and square is a（）.
An inflatable liferaft should be manually released from its cradle by（）.
After launching，an inflatable raft should be kept dry inside by（）.
After jacking down your liftboat you have an unexpected list.You find that the only cause of this list must be a flooded leg.Your next course of action should be to（）.
A sweep oar is an oar that is（）.
The Lists of Meteorological Observation Stations can be found in（）.
After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.
The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given in（）.
Mean high water is the average height of（）.