What is a typical OWS operational procedure?

07 Jan '21, 04:54

Jan. 7, 2021, 4:54 a.m.
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The usual operational procedure is as follows:

  1. Chief Engineer to inform the Master and take his permission before pumping out bilge water from the Engine Room through the 15 PPM Oily Water Separator.
  2. Confirm from Chief Engineer that vessel’s position is suitable for bilge disposal as per MARPOL regulations.
  3. Request Chief Engineer for the key to open overboard bilge discharge valve
  4. Open overboard discharge valve
  5. Close valve from OWS discharge line & open freshwater valve to 15 PPM monitor and flush thoroughly.
  6. Close fresh water flushing valve and open valve from OWS discharge line to 15 PPM monitor.
  7. Switch on 15 PPM monitor unit
  8. Open inlet to bilge separator from Bilge separator pump discharge.
  9. Open seawater suction to the bilge separator pump.
  10. Flush bilge separator with seawater for about 15 minutes.
  11. Confirm safe operation of three-way Recirculation valve located before the overboard discharge valve by pushing the test button located inside the 15 PPM panel
  12. When the unit is running normal and stabilized, change suction from seawater to the bilge tank.
  13. Observe separator operation and monitor discharge oil content.
  14. After completion of clean bilge disposal, flush bilge separator once again with seawater for about 15 minutes.
  15. Stop the bilge separator pump and isolate the OWS. Close overboard discharge valve and lock.
  16. Flush 15 PPM monitor thoroughly with fresh water.
  17. Switch off 15 PPM monitor unit.
  18. Return key back to the Chief Engineer and Inform Duty officer that the bilge disposal operation is completed and terminated.
  19. Record the operation in the Oil Record Book
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07 Jan '21, 05:02

Jan. 7, 2021, 5:02 a.m.
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