A.is easy to connect
B.provides an effective catenary and absorbs shock due to its weight
C.makes rigging a swivel unnecessary
D.prevents the tow from yawing by the drag of the chains in a seaway
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A.is more flexible and has the ability to absorb shock because of its weight
B.is less subject to wear and damage from abrasion
C.requires little maintenance
D.All of the above
A.a rotation
B.a revolution
C.space motion
D.nutation
A.greater than the declination and both are of the same name
B.less than the declination and both are of the same name
C.greater than the declination and both are of contrary name
D.less than the declination and both are of contrary name
A.Under any condition
B.If the grounding lasts over 24 hours
C.If it creates a hazard to the environment
D.At the owner's discretion
A.bifurcation
B.fish net area
C.anchorage area
D.dredging area
最新試題
A “Mediterranean moor” should be used when（）.
A chart with a scale of 1:80，000 would fall into the category of a（）.
A chart projection depicting the poles and a small area on either side of a connecting meridian，that is sometimes used for star charts，is the（）.
A change of a documented vessel’s name can only be made by the（）.
A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain（）.
A tonnage tax is levied according to the（）.
A common class of wire rope used for mooring is the 6x19 class. What does the 6 represent?（）
A celestial body’s complete orbit around another body is（）.
A “l(fā)oose” tow may cause all of the following EXCEPT（）.
A ballasted vessel sinks enroute to a dry dock. Under these circumstances，the vessel’s owner can claim（）.