The increasing needs for carrying bulk cargoes between continents by means of marine transport have increased interest in the subject of safe carriage of these cargoes by sea. Soybean seed cake is one of many bulk cargoes, currently the best substitute of animal protein in the composition of fodder. As loose bulk cargo, soybean seed cake is carried by various specialist means of land and water transport. During transport by sea this cargo tends to pour athwart on board, in effect causing to shift the ship’s gravity centre and then a list favouring further pouring of the cargo, capable of causing the vessel to capsize. There has been presented the effect of selected transport and technological quality factors, namely static angle of repose, kinetic angle of repose and the size and shape of particles on the transport safety of soybean seed cake by sea. Research results have been depicted on graphs and described statistically