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

试卷相关题目

• 1______ 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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• 2You 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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• 3In order to insure that the racon signal is visible on your 3 cm radar，the ______．

  A.10 cm radar should be placed on standby or turned off

  B.gain control should be turned to maximum

  C.radar should be stabilized，head up

  D.rain clutter control should be off but，if necessary，may be on low

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• 4A 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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• 5On no account can they cut it _______ it be fouled．

  A.would

  B.shall

  C.should

  D.do

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• 6Defense 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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• 7A 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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• 8Magnetic heading differs from compass heading by_______．

  A.compass error

  B.true heading

  C.variation

  D.deviation

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• 9Deviation is caused by ______．

  A.changes in the earth's magnetic field

  B.nearby magnetic land masses or mineral deposits

  C.magnetic influence inherent to that particular vessel

  D.the magnetic lines of force not coinciding with the lines of longitude

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• 10Your vessel is at anchor in fog while in international waters． The fog signal of another vessel，apparently underway，has been steadily growing louder and the danger of collision appears to exist．In addition to the normal fog signal，what signal may be used to indicate the presence of your vessel？______．

  A.The danger signal； five or more short and rapid blasts on the whistle

  B.Three blasts on the whistle； one short，one prolonged and one short

  C.Three blasts on the whistle； one prolonged followed by two short

  D.No special signal other than the normal fog signal

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