Loading dusty cargoes in bulk is a messy business and the ship gets covered in dust. This is not only an external problem and a hazard to those working on deck, but the dust also makes its way into the accommodation. The situation is made worse when the loading spouts are not corectly positioned and are too high as in the first picture below.
The second picture shows a ship loading grain at a terminal, where the staff there made an effort to reduce the grain dust by erecting protective covers over the hatch lids. This is a good innitiative which made a lot of difference, particularly in the accommodation. Click on an image to enlarge.