Don't forget on a ship the "walls, floors and ceilings" are either steel or aluminum. On a merchie most likely steel. A really different environment where it's likely projectiles will bounce rather than penetrate. Kneepads and elbow pads good, some Marines here may remember "kneeknockers", no visors, good, whacking yer head on a low overhead is easy enough, visors guarantee it.
What kind of tread do those "boots" have? You want a medium tread at most because non-skid surfaces can play hob with aggressive treads