A Doppler log in the volume reverberation mode indicates（）.<br>A:speed being made good<br>B:speed through the water<br>C:the set of the current<br>D:the depth of the water

A Doppler log in the volume reverberation mode indicates（）.
A:speed being made good
B:speed through the water
C:the set of the current
D:the depth of the water

出自：海船船员证

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