Yesterday, a new ISO standard was published to help port authorities, shipowners and operators navigate rules on how ships should be cleaned in an environmentally sound way. Hull cleaning is gaining traction among shipowners, while countries are increasingly introducing regulationsâbut many ports still lack practical guidance on how to manage it. âBiofouling on shipsâ hulls can spread invasive aquatic species and damage ecosystems. It also increases drag, reducing a vesselâs efficiency and leading to higher fuel consumption and increased greenhouse gas emissionsâŚ