MV Catriona is a pioneering diesel electric hybrid passenger and vehicle roll-on, roll-off ferry built for Caledonian MacBrayne for the Claonaig - Lochranza crossing. She is the third hybrid ferry commissioned and owned by Caledonian Maritime Assets, one of three such ferries in the world to incorporate a low-carbon hybrid system of diesel electric and lithium ion battery power. The ferries are sea-going and are nearly 150 ft long, accommodating 150 passengers, 23 cars or two HGVs.