单项选择题
A station in the mobile service the emissions of which are intended to facilitate search and rescue operations is（）.
A.EPIRB
B.SART
C.Mobile Station
D.Distress Alerting
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相关考题
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单项选择题
（）process the distress signal from EPIRB to determine its position and identity.
A.COSPAS-SARSAT
B.ground receiving stations
C.storing distress signal
D.Near polar orbiting satellites -
单项选择题
The range of a MF coast station is normally（）nm.
A.20 to 30
B.200
C.100
D.450 -
单项选择题
Exchange of answer-backs acts a confirmation that the messages（）at the destination.
A.have received
B.have been received
C.are received
D.are being received
