单选题Which system may be useful for messages，such as local storm warnings or a shore-to-ship distress alert，for which it is inappropriate to alert all ships in the satellite coverage area?（）ANAVTEXBEGCCAMVERDDSC
单选题
Which system may be useful for messages，such as local storm warnings or a shore-to-ship distress alert，for which it is inappropriate to alert all ships in the satellite coverage area?（）
A
NAVTEX
B
EGC
C
AMVER
D
DSC
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