No navigational aids are shown and chart is not kept corrected for alterations in depths inside the pecked lines．For more detailed information，the larger scale charts must be ______．

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• 1A shipper of cargo aboard your vessel offers a letter of indemnity for the cargo．This is done in order to obtain a(n) ______．

  A.clean Bill of Lading

  B.order Bill of Lading

  C.straight Bill of Lading

  D.through Bill of Lading

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• 2MAINLY GOOD BECOMING MODERATE．This forecast probably refers to ______ in a certain area．

  A.visibility

  B.winds

  C.sea

  D.fog

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• 3LOW AT 34N 135E ESLY SLWLY INTST NC.This description is most likely to be under the heading of ______．

  A.GL WNG

  B.GEN SYN

  C.STM WNG

  D.T Y WNG

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• 4A generally circular low pressure area is called a(n) ______．

  A.cyclone

  B.anticyclone

  C.cold front

  D.occluded front

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• 5In the Northern Hemisphere，gusty winds shifting clockwise，a rapid drop in temperature，thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies，indicate the passage of a(n) ______

  A.warm front

  B.tropical cyclone

  C.anticyclone

  D.cold front

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• 6In 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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• 7A 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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• 8One 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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• 9Sailing 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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• 10All 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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