We've been aboard the innovative Stena Connecta which is now in service on the Irish Sea.

Stena's ‘New Max’ RoRo ship has 2,848 lane metres across its 147-metre length and the ship's profile is distinctive thanks to two 28×4 metre Norsepower Rotor Sails™ installed.

They're designed to enhance energy efficiency and could deliver up to 9% fuel savings on the route between Belfast and Heysham.

The distinctive profile of the ship is causing certainly causing interest but how does it work and what difference do rotor sails make?

We've been talking the master, Capt and hearing from Norsepower, the company behind the sails. The company's head of research and development Ville Paakkari joined us from Helsinki to explain more about how the sails work and the company's future ambitions.

Thanks to Stena Line and Norsepower for taking part in this podcast.