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Dramatic improvements have occurred since the large AC synchronous - wound field - conventionally cooled motors went to sea on Queen Elizabeth 2, podded propulsion motors not even having been discussed. Electric propulsion motors have become smaller, better and more affordable. Electric propulsion motor drives have followed a similar trend. Subsequent improvements, in both naval and commercial ships, are almost certainly going to be implemented using the systems and technologies which offer the best life-cycle cost benefits; thus ocean-going ships, including naval combatants, will continue to most affordably transport either cargo or a military mission capability.