What is the minimum GZ value required for cargo ships carrying timber deck cargoes?

For cargo ships carrying timber deck cargoes, the minimum GZ (righting arm) value is crucial for ensuring the vessel's stability. A GZ value of 0.25 m is deemed the minimum acceptable level for these types of vessels. This requirement is in place to enhance safety during operations, particularly in rough seas or when the vessel heels.

Timber deck cargoes have specific stability-related considerations due to their high center of gravity and the shifting nature of the cargo. A GZ value of 0.25 m provides a buffer against excessive heeling, which can lead to loss of stability and potential capsizing. This established value reflects the need for improved righting moments that can counteract heeling forces, ensuring that the ship can return to an upright position after being tilted.

While values above 0.25 m may provide even greater safety and stability, the regulatory standard identifies this figure as the minimum for timber-loaded vessels, balancing operational needs with safety requirements in the maritime industry.