Cargo Shift Investigation: Lashings Sufficient, But Packaging Concerns Raised

After conducting a preliminary analysis of the lashing, we have determined that the lashings were sufficient. However, based on information provided by the crew, deck log records, and weather forecasts, we have found that the vessel encountered severe weather conditions with force 8 winds on the afternoon of April 5th, resulting in significant pitching and rolling.

Our survey findings indicate that only one row of dunnage moved to the starboard side, while the cargo shifted to the portside. After analyzing the force, we believe that the shift occurred first between the cargo and its steel skids. The support point of the cargo moved out of the range of the wooden dunnage support, causing the steel skids to bend while exerting force on the wooden dunnage, resulting in this row of dunnage moving to the starboard side. Prior to this shift, the securing bolts of the steel skids were damaged under large transversal cyclic stress, which may have been caused by the ship's heavy rolling. It is also possible that the bolts were not sturdy enough, had excessive preload, or there was a design flaw. In summary, it is possible that the cargo was poorly packaged.