This standard specifies the safety requirements for compression ignition engines and their essential auxiliaries used in all applications on land, underground and water, except engines used to propel road vehicles and aircraft. The special requirements needed to cover operation in potentially explosive atmospheres are not covered in this standard. The engine in terms of this standard is understood as the prime mover up to its driving extremitie(s) for power take off(s). The hazards relevant to compression ignition engines are identified in annex A. This standard should be referred to in other standards wherever compression ignition engines are used. This European Standard is not applicable to compression ignition engines which are manufactured before the date of its publication as EN.