Question. Got the right people here to get the right answer. Say... 1950s or 1960 designs of marine boilers on large vessels... say BRITANNIA etc. Apart from the obvious heating etc is there any difference, like nozzles onthe burners? Can a vessel easily switch from Bunker C to diesel? I know one of the old cruise ships in Bermuda frequently, the VOLENDAM from HAL built 1958. The vessel was having problems with soot and the residents in St George's and Hamilton were not happy with the smuts sitting on their clean white roof! HAL decided to switch from 'C' to diesel when the ship arrived alongside. End of problem. Could have the change over been done easily?