GMDSS理论英语题库(10)

湖 北 交 通 职 业 技 术 学 院

A the whole world B all Navareas

C areas from A1 to A4 D only the four INMARSAT regions 答案 D

283. It is preferable for ships lying ____ to receive MSI to ensure safe navigation A both at sea and in port B in international waters C at the anchorage D in narrow channel 答案 A

284. EGC is a____part of INMARSAT-C

A component B supportable C combined D complimentary 答案 A

285. WWNWS broadcasts ____kinds of navigational warnings by means of radio for mariners.

A four B three C several D a lot of 答案 B

286. It is possible for ships to receive safety message transmitted by Navtex station __ A in any INMARSAT regions B in each NAVAREA C at any distance D in Areas A3 and A4 答案 B

287. A NAVTEX station in each NAVAREA is usually allowed to have ____for transmission. A 10 minutes every four hours B half an hour ev ery other hour C irregular period of time D 3 minutes every two hours 答案 A

288. In order to avoid duplication, safety messages sent by international Navtex must be brief and clear .”Duplication” means ____

A repetition B misunderstanding C transcription D rejection 答案 A

289. The distance between the two Navtex stations with the same B1 character should not exceed ____nautical miles.

A 400 B 240 C 450 D 180 答案 C

290. The identification character of each Navtex station is regarded as ____to the messages.

A the only preamble B a part of preamble C the closing D the suspension 答案 B

291. With the help of morden technology ,ships are able to receive automated broadcast of safety messages____

A by day or night B almost round the clock C somewhat and sometime D from sunrise to sunset 答案 B

292. Exchange of answerbacks acts a confirmation that the messages ____at the destination.

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湖 北 交 通 职 业 技 术 学 院

A have received B have been received C are received D are being received 答案 B

293. Which of the following statement is correct?

A Navtex station have the same transmission power B Navtex station can transmission at the same time

C Navtex station have the different identification characters in each Navarea

D There are 24 Navtex station in each Navarea 答案 C

294.The difference between international and national Navtex Service is limited to __ A frequency allocated B both language and frequency C language used D transmission power and time 答案 B

295. The DSC frequency for distress alerting in AreaA2 is____ …… 此处隐藏：349字，全部文档内容请下载后查看。喜欢就下载吧 ……