Seawing: K LINE’s Innovative Wind Propulsion System for Sustainable Shipping

Japanese shipping company Kawasaki Kisen Kaisha (K LINE) has announced the completion of the first phase of development for the Seawing automated kite system, which harnesses wind power for ship propulsion. The system was developed by K LINE’s France-based subsidiary, OCEANICWING.

Initial tests conducted in June 2025 with a 300 m² kite confirmed the system’s tensile strength and performance. In July 2025, OCEANICWING launched the second phase of development, focusing on scaling up the kite and further verifying its reliability, controllability, and safety for shipboard application. Offshore trials are planned on a large bulk carrier owned and operated by K LINE.

The Seawing system is projected to reduce fuel consumption by over 10 %, depending on the vessel type, speed, route, and season. Compatible with any ship, including existing ones, it supports the industry’s shift toward cleaner fuels like liquefied natural gas (LNG), contributing to reduced CO2 emissions.

K LINE President and CEO Takenori Igarashi stated that the successful completion of phase one marks a significant step toward creating an innovative energy-saving solution for decarbonizing the shipping industry. Unlike other wind-assisted propulsion systems (WAPS), Seawing stands out for its ability to generate substantial thrust by capturing high-altitude winds.