I just cannot believe those vessels registered in 'garden' 3rd world countries of convenience such as Liberia, Sierra Leone, Bangladesh or even Panama will be able to afford to reengine or replace ships that burn, for no better term, tar-like Bunker C/residual oil. The wiki article noted above has a few weasel words that kind of back this up
"By 2020, regulations in wealthy nations require use of low sulfur fuels to combat pollution, therefore it is expected that the excess cheap yet dirty fuel would find its way into other markets, including displacing some onshore energy pro>duction in poorer nations."
Oh well, back to the OP subject