单项选择题
When the power of SART is on, it will（）.
A.transmit distress signal B.send response signal C.transmit the signal of ship’s position D.be started by X-band radar
单项选择题 The source of energy fitted in GMDSS complying vessels must be（）.
单项选择题 The NCS of INMARSAT-A system in the IOR is in（）.
单项选择题 The position of the INMARSAT satellite over the Atlantic Ocean Region-W is（）.
