A tide is called diurnal when ______.

试卷相关题目

• 1In which voyage，between two points，is the rhumb line distance NOT approximately the same as the great circle distance、 ______.

  A.The two points are in low latitudes in the same hemisphere

  B.The two points are in high latitudes in the same hemisphere

  C.The two points are near the equator，but in different hemispheres

  D.One point is near the equator，one point is in a high latitude，and both are near the 180th meridian

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• 2The issue of Notices to Mariners of charts and these aids(Radar beacons)may be delayed until such time as they are assessed to be ______．

  A.temporary

  B.permanent

  C.occasional

  D.steady

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• 3Coast Pilots and navigational charts are kept corrected and up-to-date by using the ______.

  A.pilot charts

  B.Notices to Mariners

  C.Tide Tables

  D.Current Tables

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• 4For details of these and other lights the larger scale charts and Admiralty Lists should be ______ .

  A.considered

  B.consulted

  C.concluded

  D.commanded

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• 5Which statement is TRUE of a stiff vessel、

  A.She will have an unusually high center of gravity

  B.She will have a large metacentric height

  C.She will pitch heavily

  D.Her period of roll will be large due to her large metacentric height

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• 6Positions read from this chart should be moved 0．08 minutes Southward and 0．13 minutes Eastward so as ______ adjoining chart 3833．

  A.to agree upon

  B.in accordance with

  C.to be same as

  D.to agree with

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• 7Contour elevations on this chart refer to heights in feet above mean ______.

  A.lower low water

  B.high water

  C.low water

  D.sea level

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• 8Mariners proceeding across the main routes are recommended to do so at ______.

  A.as wide an angle as practicable

  B.as wide an angle so practicable

  C.like wide an angle as practicable

  D.like wide as angle so practicable

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• 9The productivity of working shifts can be improved through a decrease of ______.

  A.working hours

  B.gangs

  C.idle time

  D.weight per set

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• 10It may be found that，in certain circumstances，radar beacon emissions can cause ______ with the normal radar display，particularly at close range．

  A.unwanted interference

  B.unexpected figures

  C.abnormal data

  D.unwanted information

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