雷达及ARPA的使用

1、第二节 雷达及ARPA的使用 1156. _A_ is not a job of the radar antenna 下列哪一项不是雷达天线的功用（）ATo receive the high-frequency pulses from the transmitter 接收发射器发来的高频脉冲BTo focus the pulses into a beam，and send them into space 把脉冲集中成束，并发射出去CTo pick up reflected pulses coming from objects that have been struck by the beam

2、接收从物标反射回来的脉冲波束DTo reflect microwaves 反射微波1157. _D_ is not used in modern radar 下列哪一项不用于现代雷达AEBL 电子方位线BVRM 活动距标圈CCRT 荧光屏DGrease pencil 蜡笔1158. _D_ typically extends from close as 0.1 nautical miles out to 32 NM （）可最近可达0.1海里,最远可达32海里AEBL 电子方位线BVRM 活动距标圈CCRT 荧光屏 Dtarget tracking range 物标跟踪范围1159. Altho

3、ugh manual plotting for CPA works well，the workload can become overwhelming when confronted with _D_ 虽然使用人工标绘也可以准确求出最近会遇距离，但是，当遇到（）时，工作量将变得非常大。Aone target Btwo targets Cthree targets Da large number of targets 大量的物标时1160. I _C_ shorebased radar assistance 我（）岸基雷达帮助AAsk 问BLook for 寻找CRequire 需要DIn ne

4、ed of 缺少1162. My radar is not workingI require shore based radar assistanceIs shore based radar assistance _B_? 834我船雷达故障，我需要岸基雷达帮助，是否有岸基雷达（）Aused 已使用的Bavailable 可以使用Cin use 正在用Dcan be used 能被使用1163. PPI is _A_ PPI是指什么Aa plan-position indicator system 平面位置显示器Bpulse-plan integration Cpulse-pulse inpu

5、t Dpower-plan input 1164. Radar makes it possible and much safer for us to sail _A_ 在（）情况下，雷达使我们的航行更加安全AIn dense fog 浓雾中BIn boisterous weather 恶劣天气CIn the open sea 在大海上DIn rivers 在河道中1165. Radar reflectors are required for _D_923下列什么船需要安装雷达反射器Aall fishing vessels over 39 feet in length 所有长度大于39英尺的渔船

6、Bsail-propelled fishing vessels 机帆并用的渔船Call fishing vessels of less than 200 GT 所有小于200总吨的渔船Dwooden hull fishing vessels with a poor radar echo 雷达回波反射性差的木质渔船1166. SWEEP INT（扫描线亮度）on radar panel is the abbreviation of _D_ 雷达面板上，“SWEEP INT”是下列哪一个词组的缩写（）Asweep introduction 引入、介绍Bsweep interest 兴趣Csweep

7、 intention 意图Dsweep intensity 强度、亮度1167. The _A_ has a built-in world map; most areas are displayed on a scale of 4000 nm from the top to the bottom of the screen，and can be zoomed in to 150 nm 下列哪一种设备有内置的世界地图，在屏幕上，从上到下最大可显示范围是4000海里，也可放大到显示范围为150海里Achartplotter BC-MAP NT一种海图类型CC-Cards DPPI A Chartp

8、lotter is a device used in marine navigation that integrates GPS data with an electronic navigational chart (ENC). The chartplotter displays the ENC along with the position, heading and speed of the ship, and may display additional information from radar, automatic information systems (AIS) or other

9、 sensors. As appropriate to particular marine applications, chartplotters may also display data from other sensors, such as echolocators/sonar.1168. The 10-cm radar as compared to a 3-cm radar of similar specifications will _C_955如果其他各种参数都一样，与3厘米波雷达相比，10厘米波雷达有什么特点（）ABe more suitable for river and ha

10、rbor navigation 更适合在河道及港内使用BProvide better range performance on low lying targets during good weather and calm seas 在天气好，海面平静的情况下，对远距离的低平物标更容易发现CHave a wider horizontal beam width 波束宽度更宽DHave more sea return during rough sea conditions 在天气恶劣情况下，有更多的海浪回波1169. The articulated light is superior to othe

11、r types of buoys because _D_ 发光清晰的灯标优于其他种类的浮标，这是因为（）AThe radar reflectors reflect better signals 雷达反射器的回波更好BFog horn signals travel farther to sea 雾号在海上传播的距离更远CIt is equipped with strobe lights这种灯标配有闪光灯DIt has a reduced watch circle这种灯标的观测周期较小1170. The closest point of approach（CPA）of a contact on a

12、 relative motion radar may be determined _C_999相对运动显示模式下，在什么情况下，可以判断出CPA（）AImmediately when the contact is noted on radar 在雷达上一看到物标回波，立即可以BOnly if the radar scope is watched constantly 只有一直观察雷达才可以CAfter the contact has been marked at least twice 至少回波出现两次以后才可以DBy an occasional glance at the radar 偶尔看

13、一眼雷达就可以1171. The correct method of switching off a marine radar is to turn power switch to _ position first，then to _B_ position1008关闭航海雷达的正确方法是，先把电源开关旋钮旋到（）再旋到（）AOff/standby BStandby/off CStandby/close DClose/standby 1172. The development of _B_ led to the fully automatic ARPA systems installed on

14、commercial ships 由于（）技术的发展，最终使商船可以安装全自动的“ARPA自动标绘雷达”系统ASeaTalk Bpowerful microprocessors and mega memory capacity 功能强大的微机处理器及容量巨大的存储器Cchartplotter 海图标绘器Dsmall-scale chart 小比例海图1173. The radar control that reduces weak echoes out to a limited distance from the ship is the _A_1158减少一定距离内的微小回波显示的控钮是（）A

15、sensitivity time control（sea-clutter control） 海浪干扰抑制Breceiver gain control 增益Cbrilliance control 亮度Dfast time constant（differentiator）微分调节1174. The radar control used to reduce sea return at close ranges is the _B_1160减少近距离内的海浪回波显示的控钮是（）AGain control 增益BSensitivity time control海浪干扰抑制CFast time const

16、ant微分调节DPulse length control 脉冲宽度1175. The radio waves used for radar are very short，only _A_ long 雷达使用的无线电波很短，只有（）长AA few centimeters 几厘米BA few fathoms 几拓CA few meters 几米DA few feet 几英尺1176. The shoreline along Rocky Point should give a good radar return because _A_ 沿“Rocky Point”的海岸线的雷达回波很清晰，这是因为（

17、）AThe shore is bluff and rocky 海岸是悬崖和石壁BOf offshore exposed rocks 岸边的石头CSubmerged reefs cause prominent breakers 被淹没的暗礁形成了明显的开花浪DThe lookout tower is marked with radar reflectors 了望塔上安装了雷达反射器1178. What is TRUE when operating in fog and other vessels are detected by radar _B_ 在雾中，当有他船被雷达探测到时，下列哪一句话是正

18、确的（）AYou should make an ample change to port for a vessel crossing on the starboard bow 你应大角度向左转向，因为有一条船正横越你船右船首BYou should maneuver in ample time if a close-quarters situation is developing 如果正在形成紧迫局面，你应及早采取行动CYou should determine the course and speed of all radar contacts at six minute intervals 你

19、应每6分钟判断一次所有回波的航向及航速（）DLong-range scanning will provide early warning of ALL other vessels within the radar's range 远距离扫描可及早提供雷达量程内内所有其他船舶的碰撞危险情况1180. What will cause the ARPA to emit a visual alarm，audible alarm，or both _C_1427什么情况下，ARPA会发出声响和/或灯光光警报（）AAn acquired target entering into a guard zo

20、ne 已捕捉的目标进入警戒区BA tracked target lost for one radar scan 在一次扫描中，已跟踪的一个目标丢失了CA tracked target entering your preset CPA-TCPA limits 已跟踪的一个目标正在进入你预设的CPA-TCPA范围DA target being initially detected within a guard zone 在警戒区内初次发现目标1181. When the relative motion display is selected all tracked objects will dis

21、play _A_ vectors 当使用相对运动显示方式时，所有被跟踪的目标将显示（）矢量线Amotion 运动Bstationary 静止Cdynamical Dflashing 闪烁1182. When using the ARPA in heavy rain，which action should you take _C_1526大雨中使用ARPA，应采取什么行动（）AIncrease the radar gain to pick up weak echoes through the rain 增大增益，以便于雨中得到微弱回波BIncrease the STC setting to re

22、duce close-in spurious signals 增大海浪干扰抑制，以减少近距离内的假回波CNavigate as though the effective range of the radar has been reduced 应假定雷达的有效工作距离受雨影响而减小，谨慎驾驶DIncrease the range of the inner and outer guard rings 增大内、外警戒圈之间的范围1183. When using the radar for navigating _C_ 当使用雷达助航时（）AThe best fix is obtained by us

23、ing a tangent bearing and a range 使用雷达观测一个目标的方位和距离是最佳的定位方法BAnd using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings 当使用两个目标的雷达距离定位时，这两个目标应可能成一直线（方位相反）CAnd using ranges，the most rapidly changing range should be measured last 使用距离（使用方位变化判断碰撞危险）时，变化最快的目标应最后测

24、量DAnd crossing a radar range of one object with the visual bearing of a second object，the two objects should be 110° apart 分别使用一个目标的雷达距离和一个物标的目测方位定位，两物标间的方位交角应大于110°1184. Which condition indicates that your radar needs maintenance _A_ 下列哪一种情况表示你船雷达需要维修了（）ASerrated range rings锯齿形距标圈 BIndire

25、ct echoes 间接回波CMultiple echoes 多次回波DBlind sector 扇形盲区1185. Which general statement concerning radar is FALSE _B_1581下列有关雷达的一般描述哪一句是错误的（）ARaising the antenna height increases the radar range 增大天线高度，可增大雷达的有效量程BThe ability of radar to detect objects is unaffected by weather conditions 雷达的控测物标的能力不受天气影响C

26、Radar bearings are less accurate than radar ranges 雷达方位不如雷达距离精度高DRadar should be checked regularly during clear weather to ensure that it is operating properly 当天气情况良好时，应经常检查雷达的工作情况，以确保雷达工作正常1186. Which statement concerning the operation of radar in fog is TRUE _D_ 雾中使用雷达助航，下列描述哪一句是正确的（）ARadar range

27、s are less accurate in fog 雾中，雷达测距的精度变差BNavigation buoys will always show up on radar 助航浮标总是能在雷达上显示出来CA sandy beach will show up clearer on radar than a rocky cliff 在雷达上沙滩比石质悬崖回波更清晰DSmall wooden boats may not show up on radar 雷达上小木船可能显示不出来1187. You are scanning the radar screen for a buoy fitted wit

28、h raconHow should this signal appear on the PPI display _A_ 使用雷达搜索一个带有雷达反射器的浮标，在PPI上该目标回波会如何显示（）AStarting with a dash and extending radially outward from the target 从目标回波处发出一个快速向外延伸的光柱BAs a broken line from center of PPI to the target 从PPI中心到目标回波之间出现一道虚线CStarting with a dot and extending radially in

29、ward from the target 从目标回波处开始，先出现一外点，然后迅速向中心延伸DStarting with a dash and extending to the right of the target从目标回波处发出一个向右延伸的光柱1188. You have another ship overtaking you close aboard to starboardYou have 3 radar targets bearing 090°relative at ranges of 0.5 mile，1 mile，and 1.5 milesIn this case，t

30、he unwanted echoes are called _A_1821当你近距离追越一条在右舷的船舶时，雷达观测到在你船右正横方位上有3外回波，距离分别为0.5、1、1.5海里，出现这种情况时，哪一个回波不是你所要的（）AMultiple echoes 多次回波BSpoking 辐射回波，轮辐回波CIndirect echoes 间接回波DSide-lobe echoes 旁瓣回波1189. Your ARPA has automatic speed inputs from the logDue to currents，the log is indicating a faster spee

31、d than the speed over the groundWhat should you expect under these circumstances _D_ 你船ARPA雷达使用自动从计程仪输入的航速，由于受流的影响，计程仪航速大于实际对地航速，你估计会出现下列哪一种情况（）AThe generated CPA will be less than the actual CPA 雷达计算的CPA会小于实际CPABThe generated TCPA will be later than the actual TCPA 雷达计算的TCPA比实际TCPA迟CThe range of in

32、itial target acquisition will be less than normal 初次捕捉物标的距离将小于正常情况下的距离DThe targets true course vector will be in error 物标的真航向矢量将出现误差1190. Your ARPA has been tracking a target and has generated the targets course and speedThe radar did not receive a target echo on its last two scans due to the weathe

33、rWhat should you expect under these circumstances _A_ 你船的ARPA雷达已经对一个目标进行跟踪并算出了该目标的航向和航速，但因天气原因，最近两次的扫描，雷达没有收到该目标的回波，你估计会出现下列哪一种情况（）AThe ARPA will generate data as if the target was still being tracked by radar 如果该目标仍处被跟踪状态，ARPA雷达将算出该目标的各项数据BThe ARPA will give an audible and/or visual lost target ala

34、rm ARPA雷达将用声响信号发了警报CThe ARPA will generate data based on sea return echoes from the vicinity where the target was lost ARPA雷达将根据所丢失的目标附近的海浪回波算出各项数据DThe ARPA has lost all memory of the target and must recompute the target data ARPA雷达会因失去该目标的各项已知数据，且必须重新计算1191. Your ARPA has two guard zonesWhat is the

35、 purpose of the inner guard zone _B_ 你船ARPA雷达设有两道警戒区，内圈警戒区起什么作用（）AAlert the watch officer that a vessel is approaching the preset CPA limit 提醒驾驶员有他船接近预设的CPA范围BWarn of small targets that are initially detected closer than the outer guard zone 由于小目标可能漏过处圈警戒区，当进入内圈警戒区时，仍可被探测到CGuard against target loss

36、during critical maneuvering situations 防止在船舶临界操纵状态下出现目标丢失DSound an alarm for targets first detected within the zone 当目标初次进入探测范围时发出警报1192. Your radar displays your ship off centerAs you proceed on your course， your ship's marker moves on the PPI scope while echoes from land masses remain stationa

37、ryWhat is this display called _B_1864你船雷达采用偏心显示方式，当你船沿航向航行时，陆标回波保持不动，但你船本船回波在显示器上移动，这种显示方式叫做（）AOff center 偏心显示BTrue motion 真运动显示CStabilized 稳定显示DHead up 艏向上显示1193. Your radar is set on a true motion displayWhich of the following will NOT appear to move across the PPI scope _A_1865你船雷达设定于真运动显示方式，下列哪种

38、物标回波不会在显示器上移动（）AEchoes from a buoy 浮标回波BOwn ship's marker 本船回波CEcho from a ship on the same course at the same speed 某条同向速船舶的回波DEcho from a ship on a reciprocal course at the same speed 某条反向同速船舶的回波1260. It is dangerous for vessels without the use of radar _B_ the estuary （入海口、河口湾、湖港区）对于（）船舶密集区域的船舶，不使用雷达是危险的ATo get BTo approach 接近CTo proceed继续进行DTo close把关上1261. It may be found that，in certain circumstances，Radar Beacon can cause unwanted interference particularly _A_773有时，在某种特殊情况下，雷达反射器会形成干扰回波，特别是（）AAt cl