Fish hold   A general view of the (empty) fish hold area.

The holes in the fish hold deck planking are to drain seawater from the catch, into the bilges. This water would find its way through the drainage/limber holes in the frame floors, and would be occasionally pumped out via the deck pump riser.

Just visible at the bottom of the picture is a short removable section of the main deck planking (with two 'finger holes') which was used to sweep any stray fish down into the hold.