The number of electronically controlled engines in service continues to grow and, at the time of writing, more than 500 engines are on order or in service. At the end of 2007, the first S40ME-B engine was prototype-tested at STX in Korea. These tests mark the beginning of an era where the full potential of the electronic fuel injection with “rate shaping” (or “injection profiling”) is utilised on production engines giving a very attractive NOx/SFOC relationship.