This article presents an analysis of internal forces and roll motion during a nodule loading simulation for a ship
at sea. The study carried out a full assessment of ship behavior during loading, which took into account wave
height and period occurrence around the Clarion–Clipperton Zone by the use of an operational efficiency index.
One of the aims was to verify whether waves have an influence on excessive ship motion and internal forces
during nodule loading. Two alternative loading sequences were developed and compared by taking loading
time, shear forces, bending moments, roll motion and waving into account. The research shows that loading is
only possible during specific sea weather conditions for the selected bulk carrier.