What is the D-1 Ballast Water Exchange Standard?

It requires that ships performing ballast water exchange do so with an efficiency of 95% volumetric exchange of ballast water.

For ships exchanging ballast water by the pumping-through method, pumping through three times the volume of each ballast water tank will be considered to meet this standard Pumping through less than three times the volume may be accepted provided the ship can demonstrate that at least 95% volumetric exchange is met.


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Written by Ship Inspection

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