Container ships witch ICE travel 20 knots/hr. Sail ships average 6 knots/hr and wind is less consistent. There are some companies working on Kites to reduce f

Container ships witch ICE travel 20 knots/hr. Sail ships average 6 knots/hr and wind is less consistent. There are some companies working on Kites to reduce fuel consumption. https://www.airseas.com/seawing https://www.airseas.com/seawing