All diesel engines that are used as prime movers on ships are exposed to the varying local climatic conditions that prevail throughout the world.

In some areas, the ambient sea and air temperatures can, occasionally, be extremely high. Likewise in arctic areas, the temperatures can be very low. Under both extreme temperature conditions some engine design precautions might be necessary to enable the engine to operate in unrestricted service.

This paper will outline operation possibilities with a standard matched engine in any extreme temperature environment and describe the possibilities for special matching of engines for more permanent operation under such conditions.