Mechanical engineer Till Braun of Germanischer Lloyd is passionate about precision. "If I was building a boat, any boat, I would want to have a classification society involved," he says. Till, Project Manager for the society’s Diesel Engines and Emissions Department, is charged with certifying that engines meet the Rules for Diesel Engines of GL. The IMO air quality requirements, known as Marpol Annex VI, are also handled by this department headed by Claus Hadler. But as one of 700 employees at the Germanischer Lloyd head office in Hamburg, he can be part of one of the teams that are called together to oversee the construction of a particular vessel.