Q: 6 (CDS-I/2010)

The equipment SONAR is used to determine the
question_subject: 
Geography
question_exam: 
CDS-I
stats: 
0,38,9,38,1,2,6
keywords: 
{'equipment sonar': [0, 0, 1, 0], 'seabed': [0, 0, 1, 0], 'depth': [0, 0, 0, 1], 'aircraft': [1, 0, 5, 6], 'earthquake': [2, 0, 2, 0]}

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