单项选择题

If the beacon is mounted at a wrong place, it may（）by sea water, chemicals, exhaust and vibrations.

A.be damaged
B.work normally regardless of harmful conditions
C.not wok though it is not in a bad condition

相关考题

By using（）system a ship can send a distress message and...

单项选择题By using（）system a ship can send a distress message and know with certainty it will be received.

A.COSPAS-SARSAT
B.SATELLITE
C.terrestrial radio
D.INMARSAT

For COSPAS-SARSAT system,（）usually transmit initial COS...

单项选择题For COSPAS-SARSAT system,（）usually transmit initial COSPAS-SARSAT alert.

A.RCC
B.MCC
C.LUT
D.MRCC

COSPAS-SARSAT is intended to be used for（）.A.distress a...

单项选择题COSPAS-SARSAT is intended to be used for（）.

A.distress alerting
B.locating 406mhz EPIRBs
C.storing distress signal
D.A and B

GMDSS