The performance of DNV-classed vessels in Port State Control continues to be one of the world's best. In the recently published Paris Memorandum of Understanding (MoU) 2004 annual report, Germanischer Lloyd, DNV and Registro Italiano Navale are singled out as among the best performing classification societies.

Based upon accumulated figures for the 3-year rolling period of 2002-2004 from the four major port state regimes in the world (namely, the Paris MoU, Tokyo MoU, Indian Ocean MoU and United States Coast Guard), DNV's detention rate as a percentage of vessels inspected was 2.73 percent, compared to the average of 6.23 percent (all Class Societies) and 4.22 percent (IACS members).