The ship had regular maintenance schedules or monthly check lists (Exhibit 2). These do not refer to the hydraulic rams. The care of the hydraulic apparatus was not a matter for the Captain but for the engine room crew or deck crew, although, of course, he had overall responsibility. Referring to a video showing the Palmgracht (Exhibit 10), Captain de Jong at p 80 of the unofficial transcript used by the parties, said he saw signs of corrosion around the top of a piston rod. Later it was suggested that this was oil or paint. In his Report (Exhibit 14) Mr Highfield, who is a Marine Surveyor, referred at p 5 to the possibility of a leak being caused by wear and tear where the seal of the piston is damaged by chrome coming away from the ram or by largish debris adhering to the piston. If the former occurred, I would not consider it to be damage within the meaning of s.8(2) of the Act, but rather a matter of wear and tear. Another expert witness, I think it was Mr J. Hocking, a Marine Engineer, whose Report became Exhibit D, stated that corrosive or flaking material could be removed by "stoning" the piston rod, and this would cause oil leaks to cease. It is true, as Mr Sexton, of Counsel for the Defendants submitted, that Captain de Jong was not cross-examined as to whether or not this had been done when the vessel was en route from Brisbane to Sydney. However, maintenance was not his prime area and I do not think that the lack of questioning the two day old Captain on this issue removes the possibility that any leak which occurred in Brisbane was due to corrosion or wear and tear, rather than to stray foreign debris.