I will agree with you that steam or turbine power plants require continuous maintenance. I've got experience, too. :-) But, read the article. The ship they'

I will agree with you that steam or turbine power plants require continuous maintenance. I've got experience, too. :-) But, read the article. The ship they're talking about is a short-haul transport with battery-electric propulsion. Perfect scenario to pioneer this concept. If it works, I'm betting that it would be possible to create a propulsion plant that will survive longer hauls without a crew.