The regular removal of algae, mucilage, shells and mussels from a ship’s hull allows seagoing vessels to cut their fuel consumption by up to 30%. And this in turn can drastically reduce their carbon emissions. Indeed, over the past few years, hull cleaning could count on a growing interest among shipping companies, shipowners and ship’s agents. How do you actually go about cleaning a ship’s hull? We ask four questions to three hull cleaning companies active in the port of Rotterdam: ECOsubsea, Ship Repair Network Group (SRN Group) and Fleet Cleaner.