Comment Re:Hybrids, diesel and Prius (Score 1) 93
A ship engine isn't a fixed RPM diesel generator, it's a variable RPM diesel engine.
I agree with the rest of your post, but ship's diesel motors used on transport ships are about as efficient as you can make an engine run. For the vast majority of their time, they run at the ideal fuel/output ratio you can get. This is not because of environmental concerns, but because it saves fuel (and money) to the companies running the ships. True, the engines are larger, but you could do worse than looking at what they do to find the most efficient ways to run a diesel engine