In order to insure that the racon signal is visible on your 3 cm radar，the ______．

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• 1A vessel's position should be plotted using bearings of ______．

  A.fixed objects on shore

  B.buoys at a distance

  C.buoys close by

  D.All of the above

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• 2On no account can they cut it _______ it be fouled．

  A.would

  B.shall

  C.should

  D.do

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• 3The Pilotage-quarantine anchorage， ______ between Damen Dao and Qingshan Dao，is defined by the lines ______ the given points．

  A.situated／connected

  B.situated／connecting

  C.situating／connected

  D.situating／connecting

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• 4______ chart 3994，positions read from this chart should be shifted 0．03 minutes Northward．

  A.To consider

  B.To check

  C.To examine

  D.To agree with

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• 5The 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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• 6You have another ship overtaking you close aboard to starboard．You have 3 radar targets bearing 090° relative at ranges of 0.5 mile，1 mile，and 1.5 miles．In this case，the unwanted echoes are called ______．

  A.multiple echoes

  B.spoking

  C.indirect echoes

  D.side-lobe echoes

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• 7______ 20 targets can be tracked at one time．When maximum tracking capacity is reached，no further acquisitions(捕获) are possible．

  A.As many as

  B.So many as

  C.As much as

  D.As more as

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• 8The system will accept a harbor map which is incorrect，therefore the operator must exercise caution in harbor selection．

  A.be considered

  B.be prudent

  C.be bold enough

  D.be carelessness

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• 9Defense 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 days notice

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• 10A correction for augmentation is included in the Nautical Almanac corrections for ______．

  A.the Sun

  B.the Moon

  C.Venus

  D.None of the above

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