What is the criterion for GZ at an angle of heel equal to or greater than 30 degrees for container ships?

The criterion for the righting lever (GZ) for container ships at an angle of heel equal to or greater than 30 degrees is established to ensure the ship's stability under various loading conditions. The minimum requirement of 0.03/C meters indicates that at this angle of heel, the righting lever should be sufficient to provide adequate stability and prevent excessive rolling or capsizing.

Container ships are subject to significant changes in weight distribution due to their cargo, and maintaining a minimum GZ value helps ensure that the vessel can right itself if it heels over. This value takes into account the ship's design and operational parameters, focusing on risk management while navigating through different sea conditions.

Choosing a requirement of 0.03/C meters reflects the need for a balance between safety and operational efficiency, taking into account the unique characteristics of container ships, including their relatively high center of gravity. The other values listed might not align with the stability standards set for these vessels, which specifically outline a minimum GZ value to promote seagoing safety.