I have pleasure in informing you that all safety equipment is in ______ working order．

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• 1In determining if risk of collision exists，such risk may sometimes exist even when an appreciable bearing change is evident，particularly when approaching ______．

  A.very large vessel

  B.a long tow

  C.a vessel at close range

  D.all A，B and C

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• 2Before sailing，mariners on duty shall check the headings of magnetic compass by comparison with ______．

  A.ship's clock

  B.engine movement recorder

  C.repeaters

  D.navigation lights

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• 3It 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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• 4The 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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• 5Mariners 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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• 6The abbreviation PPI in the Sperry Collision Avoidance System means ______．

  A.plan position indicator

  B.plain position indicator

  C.plane position indication

  D.policy proof of interest

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• 7Defense plans may cause the operation of electronic aids to navigation to be suspended with ______.

  A.no notice

  B.one day's notice

  C.a week's notice

  D.thirty (30) days notice

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• 8Calibration Stations give special transmissions for the calibration of ship's ______．

  A.gyro-compass

  B.marine radar

  C.DF

  D.navigational satellite

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• 9The annual change in ______ is 0.2 degree east in this water area．

  A.marine insurance

  B.magnetic variation

  C.maritime accident

  D.mean high water

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• 10The maximum draft to which a vessel can legally be submerged is indicated by the ______.

  A.Loadline mark

  B.Certificate of Inspection

  C.Station Bill

  D.Tonnage mark

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