The abbreviation PPI in the Sperry Collision Avoidance System means ______．

试卷相关题目

• 1I have pleasure in informing you that all safety equipment is in ______ working order．

  A.full

  B.care

  C.intentional

  D.reasonable

  开始考试点击查看答案
• 2In determining if risk of collision exists，such risk may sometimes exist even when an appreciable bearing change is evident，particularly when approaching ______．

  A.very large vessel

  B.a long tow

  C.a vessel at close range

  D.all A，B and C

  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 emissions can cause ______ with the normal radar display，particularly at close range．

  A.unwanted interference

  B.unexpected figures

  C.abnormal data

  D.unwanted information

  开始考试点击查看答案
• 5The productivity of working shifts can be improved through a decrease of ______.

  A.working hours

  B.gangs

  C.idle time

  D.weight per set

  开始考试点击查看答案
• 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 (30) days notice

  开始考试点击查看答案
• 7Calibration 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
• 8The annual change in ______ is 0.2 degree east in this water area．

  A.marine insurance

  B.magnetic variation

  C.maritime accident

  D.mean high water

  开始考试点击查看答案
• 9The maximum draft to which a vessel can legally be submerged is indicated by the ______.

  A.Loadline mark

  B.Certificate of Inspection

  C.Station Bill

  D.Tonnage mark

  开始考试点击查看答案
• 10Two vessels meeting in a head- on situation are directed by the Rules to ______.

  A.alter course to starboard and pass port to port

  B.alter course to port and pass starboard to starboard

  C.decide on which side the passage will occur by matching whistle signals

  D.slow to bare steerageway

  开始考试点击查看答案