Three weeks after a ransomware attack on DNV’s ShipManager software, the classification society is still striving to get servers for the vessel and fleet management system back online.

Up to 1,000 ships, operated by 70 companies, have been affected with the possibility of core operational data being hit, it is believed.

DNV has said its ShipManager software is a modular product that supports the management of vessels and fleets in all technical, operational and compliance aspects.