单项选择题
For ships equipped with an SES, it is（）and（）for the operator to send a distress alert.
A.easy/reliable
B.difficult/cheap
C.stable/compulsory
D.easy/expensive
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相关考题
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单项选择题
In the COSPAS-SARSAT system distress signals are processed by（）and the resulting data are forwarded to（）through（）communication network.
A.MCC/LUT/RCC
B.LUT/MCC/RCC
C.LUT/RCC/MCC
D.LUT/RCC/LUT -
单项选择题
The COSPAS-SARSAT system can provide distress alerts to the appropriate rescue authorities（）.
A.at sea
B.on land
C.in the air
D.throughout the world -
单项选择题
For COAPAS-SARSAT system,（）process the distress signal from EPIRB to determine its position and identity.
A.COSPAS-SARSAT
B.ground receiving stations
C.spacecraft
D.satellite SAR instrument
