D2 Commissioning Testing – All you need to know

Ballast Water

Note: All vessels must meet the D2 standard by 8 September 2024.


Annually, approximately 10 billion tonnes of ballast water are transported worldwide. Ballast water is essential in ensuring the stability of the vessels. Still, it constitutes a potential source of invasive and damaging species if discharged inappropriately. The International Maritime Organisation (IMO) enforces the installation of Ballast Water Management Systems (BWTS) to ensure the discharged water limits comply with the Ballast Water Management Convention (BWM Convention).

D2 Commissioning Testing

According to IMO, the purpose of commissioning testing is to validate the installation of a BWMS by demonstrating that its mechanical, physical, chemical and biological processes are working properly.

The IMO states that all merchant vessels should comply with the ‘D2 Discharge Standard’ no later than September 2024. Vessel owners must set up commissioning testing of their newly installed BWTS to ratify compliance with IMO and the US Coast Guard (USCG) discharge standards.


Note: Commissioning testing is not intended to validate the Type Approval but to demonstrate that the installed BWTS equipment is capable of achieving the regulation standards.


Why do I need D2 Commissioning Testing?

The BWM Convention adopted by IMO requires vessels to comply with the D2 Standard and install a BWTS. To deploy the system, it must be commissioned and tested according to BWM.2/ Circ.70/Rev.1 (entered into force on the 1st of June 2022). Commissioning Testing is essential to receiving the International Ballast Water Management Certificate (IBWMC).


Note: IMO D2 sampling must be carried out by a certified third party. This may no longer be carried out by the manufacturer.


How can I arrange the D2 Commissioning Testing?

At Mr. Marine, we can perform the D2 Commissioning Testing of your BWTS. An accredited technician will take the necessary samples and analyse them for organisms in accordance with the IMO BWM.2/Circ.70/Rev.1 and G2 guidelines.

Our team is present in 350+ global ports, ensuring timely and high-level service. We can assist you in your next port of call!

With Mr. Marine Ballast, you receive:

  • 24/7 availability in your nearest port
  • Competitive and clear pricing
  • Class-approved services
  • Excellent customer service
  • Thorough preparation of the service to ensure high accuracy rates

Contact us and book your D2 Commissioning Testing with us!

Additional Information

D2 Commissioning Testing can be performed upon request in combination with VGP Testing.

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