[15]Which one of the followings is incorrect about magnetic compass?
A.The magentic compass is compulsory on my vessel B.The magentic compass is prone to error
C.The magentic compass is always placed inside steel constructions D.The magentic compass needs to be calibrated to compensate for local magnetic distortion
答案：C关于磁罗经下面哪项是不正确的？磁罗经总是放在刚性结构里面
[16]Which one of the followings is correct regarding the use of gyrocompass?
A.Gyrocompass does not have to be started before sailing. B.Gyrocompass must be stopped when vessel alongside a berth C.Gyrocompass needs to be checked from time to time
D.Gyrocompass is not influenced by the latitude and ship's motion 答案：C关于旋转罗盘的用途下面哪项正确？旋转罗盘需要经常被核查
[17]What may affect the accuracy of sounding with echo sounder? A.Sea bottom B.Ship's speed C.Speed of current
D.Water temperature and density
答案：D什么会影响回声探测仪的精度？水的温度和密度
[18]What often happens when using echo-sounder at river estuary where a layer of fresh water lies on the top of denser salt water? A.A scattering layer appears. B.Echo sounder stops working. C.shallow water appears. D.Nothing abnormal happens.
答案：A当回声探测仪使用于一层淡水位于高密度海水之上的河口时将发生什么？出现散射层
[19]Regarding the use of GPS, which one of the followings is incorrect?
A.GPS is the most accurate global system today.
B.Its use is still under the U.S. Department of Defence's control C.DGPS is more accurate than GPS
D.GPS can provide a real-time position under any condition 答案：D关于GPS的用途，下列哪项是不正确的？GPS能在任何条件下提供实时的位置
[20]Without doubt the radar is a highly important navigation aid. But
duty officer shall aware that_____when using it.
A.Its range reading is more accurate than its bearing reading B.A low-lying coastline with a long, flat beach will show up properly on the radar
C.Radar is only aimed at collision avoidance.
D.The use of radar is necessary only when visibility is restricted. 答案：A毫无疑问雷达是一种非常重要的助航设备。但是值班驾驶员在使用的时候应该注意到他的距离读书比方位读数要精确
[21]As for racon,which one is incorrect. in the following? A.Racon is a radar transponder.
B.Racon is often installed on major waypoints.
C.When activated by a radar signal, the Racon sends it back with an identifier
D.Racon can be used to take place of radar
答案：D关于雷达信标，下列哪项是不正确的？雷达信标能用来取代雷达
[22]What does a Racon help with? A.Measuring the distance B.Measuring the relative speed C.Identifing a vessel
D.Identifing a seamark
答案：D雷达信标能帮助做什么？识别航标。
[23]What does ECDIS stand for?
A.Electrical Chart Display and Indication System B.Electronic Chart Display and Information System C.Electric Chart Display and Informing System D.Electronic Chart Display and Indicating System
答案：B电子海图和信息显示系统用来做什么？电子海图显示和信息系统 [24]The
IALA
buoyage
system
is
divided
into
two
categories:________.
A.The buoy system and the lighthouse system B.The central buoy system and the side buoy system C.The lateral system and the cardinal system D.The stripe system and the band system
答案：C航标协会浮标系统分为两类：侧标系统和界标系统
[25]The lateral system is used in_______. A.restricted water such as shoals, reefs or wrecks B.restricted water such as buoyed channels
C.open waters such as shonls,reefs or wrecks D.open waters such as buoyed channels
答案：B侧标系统用于限制水道例如浮筒航道
[26]In region A, The green buoys are kept to_____and red to _____when sailing from____to____. A.starboard,port,sea,land B.starboard,port,land,sea C.port,starboard,land,land D.port,starboard,sea,sea
答案：A在侧面左手标，当从海上驶向岸时绿色浮标保持在右舷，红色在左舷
[27]Which one of the followings about Tiaffic Separation Scheme(TSS) is incorrect?
A.TSS separates inbound and outbound traffic in well marked lanes. B.Regulations request all vessels to join or leave lanes at the extremities.
C.If a TSS has to be crossed, it has to be carried out as close as possible to a right angle
D.Being in the TSS does change the general rule of the Road convention