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
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1.單項(xiàng)選擇題The concept of NAVTEX is of a（）system for the broadcast and receipt of MSI.
A.search and rescue
B.safe
C.co-ordinated
D.hydrographic
2.單項(xiàng)選擇題The broadcast of MSI is made on two dedicated systems. “dedicated” means（）.
A.special
B.different
C.expensive
D.valuable
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International Navtex service means the coordinated broadcast and automatic reception on（）khz of maritime safety information by narrow-band direct-printing telegraphy using English language.
題型：?jiǎn)雾?xiàng)選擇題
Before GMDSS, if the radio officer on board is serious ill,（）.
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COSPAS-SARSAT is intended to be used for（）.
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The advantage of geostationary satellites is（）.
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Radio communication（）for many years and helps to save tens of thousands of lives.
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