VES R1 R2 R3 R4 R5 R6 R7 Depth (m) … 1.5-2.0 1.0-1.5 5.5-6.5 5.5-6.5 2.0-3.0 2.0-3.0 5.5-6.5

Table 1: The approximate depth to the cavities or channels.

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