A rose box is THE lowest point in a ships bilges. Our toys don't usually have them in scale locations, but they do exist in a form. Rose Boxes collect all the bilge water and trash that occur. They get plugged and have to be cleaned out manually (yuck). Same with our toys. Here is my solution to the problem. After installing bilge pump clogs never happen. Perfed Aluminum has holes that are .060 inches in diameter.