When not in combat, power your ship down, hit the bunk, and exit the game safely until you can resume your journey. (robertsspaceindustries.com)
However, it's much more practical and energy efficient to use wind to power ships directly, like we have done for thousands of years. (lowtechmagazine.com)
Heavy fuel oil is a dirty and polluting fossil fuel that powers ships throughout our seas and oceans — accounting for 80 % of marine fuel used worldwide. (foe.org)