78 The worker's evidence about the nature of his duties between 1996 and 1997 was again uncontroverted evidence. For the first six months he had no real problems. He was involved in tie-ups and let-gos (coming in and out of port), hatch washing, watch-keeping, chipping and painting, cleaning and overhauling machinery in the engine room (AB 71-74). However on occasions prior to the July 1997 injury, his involvement in the heavy work of hatch washing did not involve carrying the heavy equipment required but rather was limited to carrying couplings by arrangement with the bosun who knew of his condition (AB 52; 77). On occasions, prior to the injury in July 1997, when he was required to undertake a strenuous shift such as an occasion when there were, "popping pipes right, left and centre", (AB 62) which necessitated working in cramped positions under deck plates he experienced, "the couple of increases in ache and that that (sic) I had", (AB 62.) He said that working on this BHP vessel he could control his personal situation and that heavy work on the boat, "very, very rarely came up" (AB 75). The few weeks leading up to the incident in July he had a couple of niggles which he had let the bosun know about (AB 77). The idea of notifying the bosun was so that he could modify the duties (AB 85). The niggles did hinder his work a bit. That was why he notified the bosun who gave him watch-keeping instead of his roster on the deck and on occasions his fellow seamen, "....would jump in and do the job for me and let me take a spell" (AB 85-86). He was fairly guarded about what he did on board prior to July 1997 and the way he did it and the bosun, "actually used to go out of his way to have people help me in the harder jobs and kept me away from some of the real rugged stuff", (AB 253).