What is Ventilation with respect to Enclosed space?

  • Ventilation (either forced or natural) to be carried out before entry is permitted.
  • If forced ventilation is used then minimum of two air changes must take place.
  • If potentially dangerous spaces allow for between 10-20 air changes per hour.
  • If natural ventilation is only available space must be allowed to “breathe” for at least 24 hours prior entry.
  • Full ventilation may be ensured by filling the tank with clean sea water and pumping out to ensure fresh air enters the space. (This should be coupled by forced ventilation).
  • No one must enter a cargo pump room without the permission of the Proper Officer.