Your radar is set on a true motion display．Which of the following will NOT appear to moveacross the PPI scope、

试卷相关题目

• 1The radio waves used for radar are very short，only ______ long．

  A.a few centimeters

  B.a few fathoms

  C.a few meters

  D.a few feet

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• 2Before sailing，mariners on duty shall check the headings of magnetic compass by comparison with ______．

  A.ship's clock

  B.engine movement recorder

  C.repeaters

  D.navigation lights

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• 3It may be found that，in certain circumstances，Radar Beacon can cause unwanted interference particularly ______．

  A.at close range

  B.at end on situation

  C.at head on situation

  D.at crossing situation

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• 4On no account can they cut it ______ it be fouled．

  A.would

  B.shall

  C.should

  D.do

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• 5Which of the following statement is correct regarding ship handling when in the vicinity of traffic separation schemes？______．(1)A vessel shall，so far as practicable，avoid crossing traffic lanes (2)If obliged to cross traffic lanes，she shall do so as nearly as practicable at right angles to the general direction of traffic flow．

  A.(1) only

  B.(2) only

  C.Both(1) and (2)

  D.Neither (1) nor (2)

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• 6The 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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• 7Calibration Stations give special transmissions for the calibration of ship's ______．

  A.gyro-compass

  B.marine radar

  C.DF

  D.navigational satellite

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• 8To obtain accuracy in fixing by DF，______ and three stations should be used．

  A.parallel bearings

  B.long-range bearings

  C.short-range bearings

  D.cross bearings

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• 9A compass card without north-seeking capability that is used for relative bearings is a(n) ______．

  A.bearing circle

  B.pelorus

  C.bearing bar

  D.alidade

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• 10Before switching on gyro-compass，you should make sure that the power supply on board is ______．

  A.high or low

  B.AC or DC

  C.strong or weak

  D.on or off

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