The main difference between IMO 2 and IMO 3 chemical tankers lies in the level of containment required for the products they transport and, consequently, their survivability requirements in a damaged condition.
IMO 2 chemical tankers are designed to transport products that require significant preventive measures to avoid cargo release. IMO 3 chemical tankers, on the other hand, transport products that require a moderate degree of containment, aiming to increase the ship's survival capability if it sustains damage.
Here's a breakdown:
- IMO 2 Tankers:
- Carry products posing a greater risk to the environment or safety if released.
- Require more stringent construction standards and operational procedures to prevent spills.
- Focus on prevention of cargo release.
- IMO 3 Tankers:
- Carry products with a lesser degree of hazard.
- Designed to withstand a certain level of damage and still maintain containment.
- Focus on mitigation of consequences after damage, including enhanced stability and damage control measures.
In essence, the IMO 2 designation implies a higher level of hazard associated with the cargo, necessitating more robust preventive measures. IMO 3 tankers are designed for cargoes that present a moderate hazard, and the ship design emphasizes survivability and damage control.
