单项选择题
A.NAVTEX B.EGC C.HF-telex D.all of above
The existing terrestrial radio system has a number of b...
单项选择题The existing terrestrial radio system has a number of basic flaws which（）.
A.can be overcome by using traditional techniques B.cannot be overcome by satellite system C.can be overcome by satellite and digital techniques D.cannot be tackled by any modern system
From the ship owner’s point of view,（）is the most impor...
单项选择题From the ship owner’s point of view,（）is the most important advantage Inmarsat providing with.
A.business opportunity B.good-quality radio telephone conversations C.telex service D.both B and C
Ships sailing in（）are able to receive and print out EGC...
单项选择题Ships sailing in（）are able to receive and print out EGC message.
A.a fixed area or Navarea in any ocean region B.a Navarea or weather forecast area C.the designated area or given geographic position D.anywhere of the world
