The Coordinator Surface Search in a SAR situation should display by day（）.<br>A:the code flags FR<br>B:a black ball over a black diamond shape<br>C:code flag Quebec over a black ball<br>D:two black diamond shapes in a vertical line

The Coordinator Surface Search in a SAR situation should display by day（）.
A:the code flags FR
B:a black ball over a black diamond shape
C:code flag Quebec over a black ball
D:two black diamond shapes in a vertical line

出自：海船船员证

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