What is double hulling?

Double hulling is a design feature aimed at improving the safety and structural integrity of ships, particularly oil tankers. The technique involves constructing a second layer around the existing hull, typically with a few feet of space in between. In case of a collision or grounding, the outer hull absorbs the initial impact and prevents the cargo from spilling into the sea. The gap between the hulls also provides additional protection against corrosion and structural damage. Double hulling is now mandated for all new oil tankers and is gradually being extended to other types of ships. Critics argue that double hulling is not a foolproof solution and can pose various technical and economic challenges. However, it remains a key strategy to reduce the environmental and economic risks associated with oil spills.