Background to the Ballast Water Management Convention

The International Maritime Organisation (IMO) has created the International Convention for the Control and Management of Ships' Ballast Water and Sediments (BWM Convention). This Convention shall regulate the discharges / exchange of ballast water to reduce the risk of introducing non-native species.

The due date for installation of a ballast water treatment system depends on vessel's year of construction and vessel's total ballast capacity. For details pls have a look to the table down below.

The IMO regulation about ballast water exchange or ballast water treatment








The Convention will come into force 12 months after the date by which not less than 30 states (the combined merchant fleet of which constitutes not less than thirty-five percent of the gross tonnage of the world's merchant shipping) have ratified it. To date, it has been ratified by 26 states constituting 24% of the world's merchant shipping fleet.

But there are stated a lot of special territorial requirements. These are detailed in the National Ballast Water Management Requirements guide which can be downloaded at www.lr.org/bwm

IMO regulation

  • Our systems are compliant with the IMO BWM-Convention, Annex D, Regulation D-2 Ballastwater Performance Standard.
  • Our systems are type approved in compliance with the guidelines for approval Ballast Water Management Systems (G8) of Res. MEPC.125(53).
  • Our systems meet the IMO MEPC in accordance with the procedure for approval of Ballast Water Management Systems that make use of active substances (G9) resolution of Res. MEPC. 1268(53).
  • Our systems are compliant with the US Coast Guard regulations of the State California and they are certified by the DNV concerning explosion protection and prevention according to the ATEX Guidelines.




Until October 31st, 2010 approx. 25% of the required 30%, this corresponds to 27 of the required 30 flagstates, have ratified the "International Convention for the Control and Management of Ship's Ballast and Sediments".



It is most likely that, within a short time, Panama and in 2011 the USA and Germany are going to ratify the Convention as well.