Energy Observer docked in London in 2019. Image Credit: Ship & Bunker
A hydrogen fuel cell powered boat has completed its first sea trials in Japan.
The experimental vessel is a product of a joint project involving two Asian firms, Yanmar and Japan's Toyota, according to the website plugboats.
Separately, Toyota has the technology onboard the Energy Observer, a catamaran undertaking a global voyage powered by solar power and hydrogen.
The Japanese manufacturer is one of the backers of the eco ship which is seen as a laboratory for alternative marine fuels.
While oil-derived bunker fuel remains the principal fuel for ships, other energy forms are gaining in prominence with liquified natural gas seen by many as the commercial front-runner. But shipping firms are taking an increased interest in other alternative forms, one of which is hydrogen.