birthed three levels below deck a team is working against the clock the men have eight hours in which to replace two power units from one of the four diesel engines the maintenance work can only be carried out by specialists while the covering is being removed at the top one of the men crawls under the still warm engine to drain the cooling liquid he then opens the heavy covers to gain access to the interior of the engine above him two mechanics are loosening the bolts on the cylinder unit so far everything is going according to plan