單項(xiàng)選擇題There are（）operational satellites in the INMARSAT system covering the whole globe except the polar regions.

A.3
B.4
C.8
D.12


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1.單項(xiàng)選擇題The satellites over the major ocean regions cover the globe（）.

A.besides the polar regions
B.including the North Pole and the South Pole
C.above 70°N and below 70°S
D.as for north and south as 70°

2.單項(xiàng)選擇題In NAVTEX service, VITAL warnings will（）by transmitting station.

A.be transmitted at once though the frequency is not clear
B.be transmitted as soon as the frequency is cleared coordinately
C.be transmitted at its scheduled transmissions
D.be transmitted at next scheduled transmissions

3.單項(xiàng)選擇題In NAVTEX service, the subject indicate character B means（）.

A.meteorological warnings
B.navigational warnings
C.search and rescue information
D.meteorological forecast

4.單項(xiàng)選擇題NAVTEX transmissions have a designed range of about（）nautical miles.

A.300
B.400
C.500
D.600

5.單項(xiàng)選擇題The NAVTEX receiver can be mounted on（）.

A.on the bridge
B.in the coast station
C.on the forecastle
D.on starboard side