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1.南赤道流由几内亚湾开始,沿着约4°N~10°S之间(),属于中性流。
单选题A. 向西流动~||~向东流动~||~向西南流动~||~向西北流动
2.一般地面反气旋中心气压值在()
单选题A. 1000~1020hPa之间,目前的最高记录是10533hPa~||~1040~1060hPa之间,目前的最高记录是10833hPa~||~1020~1040hPa之间,目前的最高记录是10833hPa~||~一般在980~1000hPa之间,目前的最高记录是10333hPa
3.A vessel on the high seas that is not under command shall display which of the following day signals? ______
单选题A. Twoblackballs~||~Threeblackballs~||~Tworedballs~||~Threeredballs
4.在空盒气压表上读数后,除温度订正外,还需进行()才能得到本站气压。
单选题A. 刻度订正和纬度订正~||~高度订正和刻度订正~||~刻度订正和补充订正~||~高度订正和补充订正
5.It takes about 12 seconds to reverse______full speed ahead______full speed astern.
单选题A. at,to~||~to,from~||~from,to~||~at,from
6.某港某日潮汐资料为:090692cm,1342418cm。该港该日1100的潮高为()
单选题A. 211cm~||~225cm~||~229cm~||~234cm
7.下列有关真方位度量的说法中,正确是()
单选题A. 由真北逆时针度量到物标方位线,度量范围000o~360o~||~由真北顺时针度量到物标方位线,度量范围000o~360o~||~由陀螺北逆时针度量到物标方位线,度量范围000o~360o~||~由陀螺北顺时针度量到物标方位线,度量范围000o~360o
8.海图数据库包含海图及其他航海出版物的基础数据ENC及其更新数据,它们在系统内形成()供航海者使用
单选题A. ECDIS~||~ENC~||~SENC
9.A correction for augmentation is included in the Nautical Almanac corrections for ______.
单选题A. theSun~||~theMoon~||~Venus~||~Noneoftheabove
10.Several shoals______reported to exist in the area southwest of the Brothers.
单选题A. have~||~havebeen~||~has~||~hasbeen
11.船舶恒向恒速运动时,陀螺罗经主轴的稳定位置与航速为零时主轴稳定位置二者在方位上的夹角称为()
单选题A. 速度误差~||~摇摆误差~||~冲击误差~||~纬度误差
12.The commander of a rescue unit designated to co-ordinate search and rescue operations within a specified area is the ______.
单选题A. Generalcommander~||~Commandergeneral~||~On-scenecommander~||~Searchcommander
13.目标的位置(距离和方位)数据在捕获后即可显示,目标的CPA在()左右(性能标准规定在1min之内)才能显示。
单选题A. 10s~||~20s~||~30s~||~40s
14.兰勃特投影法又称等角正割圆锥投影。将地球体的()纬圈与圆锥面相割。
单选题A. 30°和45°~||~30°和60°~||~225°和45°~||~33°和66°
15.In the daytime, you see a large sailing vessel on the beam. You know that she is also propelled by machinery if she shows ______.
单选题A. ablackball~||~ablackcone~||~twoblackcones~||~abasket
16.气压场:锋面两侧的()
单选题A. 气压梯度连续,等压线过锋线的折角指向低压~||~气压梯度连续,等压线过锋线的折角指向高压~||~气压梯度不连续,等压线过锋线的折角指向低压~||~气压梯度是不连续的,等压线通过锋面有指向高压的折角
17.ECS是用来显示()的海图显示系统。
单选题A. 矢量电子海图~||~光栅海图~||~系统电子航海图~||~非官方矢量电子海图或光栅电子海图数据库
18.Navigational warnings and weather bulletins for shipping ______ from Singapore Radio.
单选题A. broadcast~||~broadcasted~||~arebroadcast~||~arebroadcasted
19.罗北偏离真北的角度称为()
单选题A. 磁差~||~自差~||~罗经差~||~陀罗差
20.The correct method of switching off a marine radar is to turn power switch to ____ position fisrt, then to ______ position.
单选题A. off/standby~||~standby/off~||~standby/close~||~close/standby
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