A.clearing weather
B.that a warm front has passed
C.probable thunderstorm activity
D.an approaching hurricane or typhoon
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A.vertical air movements
B.heavy rainstorms
C.horizontal air movements
D.any movement of moist air
A.Skull and crossbones
B.Yellow and white
C.Red and white
D.White and black
A.soft clay
B.hard mud
C.very soft mud
D.sand
A.immediately after restoring vital services
B.immediately
C.following control of flooding
D.following establishment of fire boundaries
A.prevailing westerlies
B.horse latitudes
C.trade winds
D.subpolar low pressure belts
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Chart legends which indicate a conspicuous landmark are printed in（）.
Deck beams on a ship are generally spaced at equal intervals and run（）.
Concerning a celestial observation，the azimuth angle is measured from the principal vertical circle to the（）.
Coiling new rope against the lay，bringing the lower end up through the center of the coil，then coiling with the lay，in order to remove the kinks，is known as（）.
Corrosive liquids and acids should have which kind of label?（）
Consideration should be given in planning for the mooring orientation in a new location so that in adverse weather a crane is available to off-load the supply vessel on what side of the unit?（）
Concerning the identification signal for a pilot vessel，in fog，which statement is TRUE?（）
Diesel powered industrial trucks on a ship that are provided with safeguards to the exhaust，fuel，and electrical systems are designated（）.
Charts showing the coast of Mexico are produced by the United States（）.
Deneb is found in what constellation?（）