In small Dock 4, Crna rijeka floating dredge is being serviced. Owned by the Ploče Port, it is 40 m long and 9.5 m wide, and was built in the Netherlands in 2007.
Within one month, corrosion protection of the submarine and above-water parts of the panel will be performed, i.e. washing, sand blasting and painting, with the inevitable replacement of zinc anodes. There will also be electrical works, locksmith and pipe works, demounting and arrangement of the pile-drivers, replacement of cooling engine pipes, safety fence and windlass cables, as well as works on valves and valve pumps.