Eco Marine Power is preparing to put its rigid solar energy sails through their paces next year. The EnergySail from EMP can harness the power of the wind and sun at the same time, for high-efficiency transport on the high seas.
A related signal was spotted by Carol Brighton:
"Retractable solar sails to help power 'world's most eco-friendly cruise ship'"
Retractable solar sails to help power "world's most eco-friendly cruise ship" https://t.co/wZ0iN4xv9s via @inhabitat