Hi I just got a 79 T Craft 24' all fiberglass for 8oo including the trailer but my guestion is there is a section in the floor that lifts up and is hinged in the middle so you can open either end and at each end it has a hole with a grommet so I think water can make its way to the bilge but what is this section for it is about 6' long and about 18" wide and about 10" deep