Alarming amounts of ships exhaust gases emitted worldwide forced the International Maritime Organization (IMO) to issue some restricted maritime legislation for reducing the adverse environmental impacts arising from such emissions. Consequently, ships emission reduction became one of the technical and economic challenges that the ship operators are facing. The present paper addresses the different strategies that can be used to reduce these emissions, especially nitrogen oxides and sulfur oxides. Applying one of those strategies is the matter of ship type and working area. The outcomes are very satisfactory from the point of view of environment and economic issues and reflected the importance of implementing these strategies.