Shifting:
Some cargoes may have a tendency to shift across the ship in heavy weather and so correct trimming of the cargo is required. Some cargoes such as grain may need extra measures to be taken to secure the surface. For example, bulk grain may be over stowed with bagged grain.
As a general rule all cargoes should be trimmed level or nearly level. and whenever possible spaces should be filled as fully as practicable without putting excessive stress on the structure
Gas emission :
Explosive gasses such as methane and poisonous gasses such as carbon monoxide may be produced by some cargoes. For example coal
