MV Catriona (Scottish Gaelic: Catrìona) 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 46 metres (150 ft) long, accommodating 150 passengers, 23 cars or two HGVs.