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Page Title: Current Calculations, Continued
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Current Calculations, Continued Flood Dir OPNAV  3530/41  (4-73) VEL OF CURRENT Time  Diff Slack Water Time  Diff Max Current Vel  Ratio Max Flood Vel  Ratio Max Ebb Ebb Dir Step 5. 6. 7. 8. 9. 10. Action Inspect  reference  station  time  data. Determine  whether  the  desired  time falls  between  flood  or  ebb  times.  In our  case  the  current  is  flooding.  We need  to  know  this  to  determine  which slack  water  time  difference  to  use. Table  2  labels  slack  water  as  Min. before  Flood  or  Min.  before  Ebb. Enter  the  time  difference. Enter  the  flood  time  difference. Follow  the  data  to  the  right  and  find the  values  for  velocity  ratios  and directions  from  the  SPEED  RATIOS and   AVERAGE   SPEED   AND DIRECTIONS   columns. Enter ratio. Enter direction. Enter direction. Completed  Strip Form - 0 41 - 0 47 1.1 1.0 195° 000° 7-20

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