Here’s a video of a catamaran 100% pulled by a kite from 3 years ago:
Project KITE BOAT - 25 Knots - Part TWO - YouTube
The principle is explained on:
See also
Powering Container Ships with Food Scraps:
What about cruise ships with onboard conversion of food scraps to methanol?
Meanwhile, can the engines run on regular bunker fuel, or are they locked in to methanol?
The article says Maersk wants to convert a quarter of their container ships to methanol.
Next topic here: Slow Chat II