单项选择题
When the power of a SART is on , it will（）.
A.transmit distress signal B.send response signal C.transmit the signal of ship‟s position D.be interrogated by X-band radar
单项选择题 The SART should provide a（）indication of its correct operation and should also inform survivors when it is interrogated by radar.
单项选择题 The ARQ mode should be applied（）.
单项选择题 Signals for locating will be transmitted in the 9GHz band by means of（）.
