From the Canary Media Site
French startup Airseas have started trials of kite power supplementing the energy used on cargo shipping.
https://www.canarymedia.com/articles/sea-transport/watch-this-cargo-ship-fly-a-giant-kite-to-save-fuel-and-cut-emissions
Airseas deployed both a 2,700-square-foot kite and a 5,400-square-foot version.
Airseas estimates that its Seawing system will eventually be able to curb ships’ fuel consumption — and associated greenhouse gas emissions — by an average of 20 percent.
I believe there are some trials of onshore based systems in Scotland and will update when information is available / appropriate.
I haven't been out on either with Board, buggy or indeed static over the last 3 or 4 months, fingers crossed for some 1/2 decent weather.
Regards from the UK