In the moving boat method of stream flow measurements, the following measurements are required

i) velocity and direction of current meter

ii) speed of the boat

iii) depths and time interval between depth readings

The correct answer is

- 1
  
  (i) and (iii)
- 2
  
  (ii) and (iii)
- 3
  
  Only (ii)
- 4
  
  (i), (ii) and (iii)

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