A.loss of maneuverability
B.lines to part
C.damage to the towing vessel and tow
D.a saving in the transit time
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A.small plate which fills the aperture between riveted strakes and the vessel framing
B.backing plate which is used to level the strakes while riveting，and then removed
C.internal frame to which the side shell is riveted
D.seam that is welded after riveting is completed
A.matching pulse rates of at least 20 stations
B.an automatic on-and-off switch
C.a horizontal matching of all delayed hyperbolic signals
D.automatic signal acquisition and cycle matching
A.be a stopper
B.shorten a line
C.join lines of equal size
D.keep a line from passing through a sheave
A.there are fifteen pounds of CO2 in the container
B.the container，when full，weighs fifteen pounds
C.the pressure at the discharge nozzle is l5 psi
D.the empty container weighs fifteen pounds
A.a safety line attached to a man working over the side
B.used to measure water depth
C.used to slow the headway of a barge
D.used to measure the overhead height of a bridge
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A crew member is having an epileptic convulsion. You should（）.
A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain（）.
A crew member reports that the high-pressure alarm light of a low-pressure CO2 fixed fire extinguishing system is illuminated. The most probable cause of this condition would be that（）.
A “reaching” course is one in which the wind（）.
A casualty report of an intentional grounding of a ship is required under what condition?（）
A chart position enclosed by a square is a(n)（）.
A celestial body will cross the prime vertical circle when the latitude is numerically（）.
A copy of the Articles of Agreement，less the signatures，is required to be posted. This document is called the（）.
A “check” line is（）.
A common class of wire rope used for mooring is the 6x19 class. What does the 6 represent?（）