Admiralty Notices to Mariners，containing important information for the mariners and enabling them to keep their charts and books corrected for the latest information，are issued daily and published in ______．

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• 1Bearings are true reckoned ______ in Admiralty Charts．

  A.clockwise from 000 to 359 degrees

  B.clockwise from 359 to 000 degrees

  C.anti-clockwise from 000 to 359 degrees

  D.anti-clockwise from 359 to 000 degrees

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• 2Wind direction may be determined by observing all of the following EXCEPT ______．

  A.low clouds

  B.waves

  C.whitecaps

  D.swells

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• 3It is predicted that heavy rains are ______ to flood the harbor and its vicinity in a few days．

  A.frightening

  B.threatening

  C.scattering

  D.warning

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• 4By plotting the analysis messages on weather charts，we are able to ______．

  A.prevent any possible accident at sea

  B.prepare a reasonable forecast of the wind and weather

  C.help the mariner to fix a accurate ship's position

  D.aid the salvage of a ship in peril

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• 5This notice will ______ you of the problem．

  A.use to remind

  B.use to tell

  C.serve to remind

  D.be served to talk

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• 6A line connecting all possible positions of your vessel at any given time is a ______．

  A.longitude line

  B.isogonic lines

  C.latitude line

  D.line of position

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• 7Mean high water is the average height of ______．

  A.the higher high waters

  B.the lower high waters

  C.the lower of the two daily tides

  D.all high waters

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• 8On a chart，the characteristic of the light on a lighthouse is shown as flashing white with a red sector．The red sector ______．

  A.indicates the limits of the navigable channel

  B.indicates a danger area

  C.is used to identify the characteristics of the light

  D.serves no significant purpose

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• 9Attention is ______ the advice on the use of charts in The Mariner's Handbook Chapter 3，Section 1．

  A.fixed to

  B.needed for

  C.pushed to

  D.drawn to

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• 10Navigational charts are subject to frequent changes，the important ones of which are promulgated by ______．

  A.Admiralty Notices to Mariners

  B.Mariner's Handbook

  C.Catalogue

  D.Sailing Directions

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