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

• 1Your radar is set on a true motion display．Which of the following will NOT appear to moveacross the PPI scope、

  A.Echoes from a buoy

  B.Own ship's marker

  C.Echo from a ship on the same course at the same speed

  D.Echo from a ship on a reciprocal course at the same speed

  开始考试点击查看答案
• 2The 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

  开始考试点击查看答案
• 3Before 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

  开始考试点击查看答案
• 4It 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

  开始考试点击查看答案
• 5On no account can they cut it ______ it be fouled．

  A.would

  B.shall

  C.should

  D.do

  开始考试点击查看答案
• 6Calibration Stations give special transmissions for the calibration of ship's ______．

  A.gyro-compass

  B.marine radar

  C.DF

  D.navigational satellite

  开始考试点击查看答案
• 7To 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

  开始考试点击查看答案
• 8A 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

  开始考试点击查看答案
• 9Before 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

  开始考试点击查看答案
• 10What is a requirement for any action taken to avoid collision、

  A.When in sight of another vessel，any action taken must be accompanied by sound signals

  B.The action taken must include changing the speed of the vessel

  C.The action must be positive and made in ample time

  D.All of the above

  开始考试点击查看答案