A chart has extensive corrections to be made to it. When these are made and the chart is again printed，the chart issue is a _______.

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• 1All events relating to navigation，such as ship's position，speed and details of the weather，are recorded in ______．

  A.Logbook

  B.Bell Book

  C.Oil Record Book

  D.Compass Error Book

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• 2Sailing directions are kept up to date by ______．

  A.publications

  B.notices to mariners

  C.supplements

  D.Annual Summary of Admiralty Notices to Mariners

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• 3One of the principal dangers inherent in liquefied petroleum gas is that ______．

  A.as it warms up it becomes heavier than air

  B.the way it reacts with sea water

  C.its low temperature causes frostbite or freezing

  D.the strong odor it produces

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• 4A radio medical advice service ______ ships of all nationalities and no charge is made for this service．

  A.is available to

  B.is available for

  C.are available to

  D.are available for

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• 5In revised editions of Admiralty charts the ______ are corrected first．

  A.smaller scales

  B.larger scales

  C.smaller scales and larger scales

  D.moderate scales

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• 6Deviation is the angle between the ______．

  A.true meridian and the axis of the compass card

  B.true meridian and the magnetic meridian

  C.magnetic meridian and the axis of the compass card

  D.axis of the compass card and the degaussing meridian

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• 7In which voyage，between two points，is the rhumb line distance NOT approximately the sameas 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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• 8Do not _____the watch to the relieving officer until he has verbally expressed his acknowledgment of the information which has been passed by the officer handing over．

  A.turn over

  B.hand over

  C.take over

  D.hands off

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• 9Charted depth is the ______．

  A.vertical distance from the tidal datum to the ocean bottom plus the height of the tide．

  B.vertical distance from the tidal datum to the ocean bottom

  C.average height of water over a specified period of time

  D.average height of all low waters at a place

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• 10Mariners 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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