Because pneumatic unloaders produce less dust emission, equipment operators consequently inhale lower quantities of dust which makes them safer to work with. In comparison to grabs, from which material can so easily escape, practically nothing gets out of an enclosed pneumatic discharge operation. This lack of dust is much more notable during hold cleaning operations, which is when grab operatives are much more exposed to unwanted atmospheric discharges. So for those workers deployed in the hold during grab operations, safety issues remain a real concern.