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
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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
A.two red lights
B.one green light
C.one white light
D.one amber light
A.circle of equal altitude
B.parallel of declination
C.parallel of altitude
D.vertical circle
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The information on ocean voyage planning with routeing details for powered and sailing vessels is likely found in（）.
Mean high water is the average height of（）.
After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.
A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.
The information on（）is not likely found in The Mariners Handbook.
The daily predictions of the times and heights of high and low water for a selection of Standard Ports are given in（）.
Light Lists for coastal waters are（）.
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（）.
The international number，location and/or name，geographical co-ordinates，characteristics and intensity，elevation in metres，range in sea miles and description of structure of a light can be found in（）.