engleski

Environmental influence in the ship development

It has been often claimed that the ships sail in open sea far away from the shoreline, leading to the assumption that emissions from the vessels do not contribute to the pollution of the land. The investigations does not support this approach .It is indicated that 74 - 83 % of the ships are sailing in world-wide trade within 200 nautical miles of the land. Thus most of the ships are actually relatively near the land and so the ships have a real impact on overrrall emission levels. The limitations of the NO and SO emission, international and local, are on the way. The engine speed dependent "IMO-curve" can be seen as a starting point for exhaust emission restrictions. Most of the modern engine types can meet the IMO -curve without any secondary means. The several proposals have been brought out following the general, relatively strict trend applied for landbased industry. Several ferry owners already invest today in Selective Catalytic Reduction (SCR) units or are at least prepared for later installation of SCR units for vessels operating on the Baltic Sea. Local restrictions will most obviously take place first through emission charges related to actual emissions in special areas.

ships emissions; pollution of the land; IMO-curve; SCR

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