Batteries, yes. And there's an emergency generator that runs on diesel (big ships run on "bunker oil") which can be started with batteries or manually. https:/

Batteries, yes. And there's an emergency generator that runs on diesel (big ships run on "bunker oil") which can be started with batteries or manually. https://www.youtube.com/shorts/_Y2VNS5TFFY https://www.youtube.com/shorts/_Y2VNS5TFFY (this one with a hydraulic hand pump) https://marineengineeringonline.com/emergency-generator-on-ships/ https://marineengineeringonline.com/emergency-generator-on-s...