There are specific and real savings to be made on fuel, the single largest expense for the ships, by upgrading the existing fleet instead of opting for the new environmental ships that are advertised heavily by the yards these days, says Maersk Line's Head of Newbuildings, Michael Weigaard Heimann. Upgrading, retrofitting, has the added, significant benefit for the shipping industry that it doesn't increase the massive overcapacity that will plague the industry in years to come.