The European authorities' control of ships' fuel when they call in European ports is extremely limited, and carriers can save millions when sailing in, for instance, the Baltic Sea and North Sea by not using the more expensive, low-sulphur fuel. This is evident from surveys performed by th EU-Commission and others, and the results are supported by numbers from Maersk Line and Maersk Tankers, according to Niels Bjørn L. Mortensen, Director for Regulatory Affairs at Maersk Maritime Technology. He describes the European authorities' control of ship fuel as flawed.