Air lubrication for ship's bottoms

Using air bubbles to lubricate ship’s bottom and sides, thus reducing drag, is not an entirely new idea. It has been used on icebreakers for years, but that is for a somewhat different purpose.

CSSC will use an air lubricating system to improve fuel efficiency on a new LNG carrier under construction:

The system has been developed in the UK:
https://www.silverstream-tech.com/the-technology/