Shipyard
Many studies have shown that painting is what generates almost half dangerous waste at a shipyard due to using high-pressure equipment to wash or remove any unwanted material that is on it like rust. Which will eventually make its way to the water and creates water pollution to the environment. Once these have compromised the surface of the hull the ship must go to the shipyard for maintenance. In a study in 2011 samples of sediments were collected from two sites in coastal marine area of Yongho Bay, one from the shipyard yard and the other 500m away. These results had analyzed that both samples contained metals that included Al, Fe, Li, V, Cr, Mn, Ni, Cu, Zn, As, Cd, Sn, and Pb. In addition, it had been confirmed that the concentration was higher in the first sample that was by the shipyard then the sample taking 500m away and was due to paint fragments applied to the steel ship hulls.
National Shipyard
It was intended to develop the yards for the construction of prefabricated ships of the "N" design. Parts would be manufactured in other parts of the country, and moved to the shipyards by rail for assembly. The first ships were scheduled to be launched in October 1918. The shipyards themselves were to be built by Royal Engineers and German prisoners of war, with the ships being assembled by civilian labour. In March 1918 Geddes stated that the monthly output of British shipbuilding yards would have to be nearly doubled before the monthly rate of sinking was made good.