MV Orion (formerly MV Saturn, , and MV Orcadia) is a ro-ro passenger and vehicle ferry. Saturn was operated by Caledonian MacBrayne in the Firth of Clyde in Scotland between 1978 and 2011, for the first decade of her career on the Rothesay crossing. Later, she also saw service on the Dunoon and Brodick crossings, as well as on short cruises around the Clyde. After a lengthy lay-up, she was sold in 2015 to Pentland Ferries, renamed Orcadia, and converted for ferry services work with the renewable energy sector around Orkney and the Pentland Firth. In 2021 she was sold to Cretan Cargo Lines, Greece, renamed Orion, and towed to Perama for conversion to increase freight capacity. Description and Construction Saturn was an evolution of the design used for the earlier and . Instead of conventional propellers, all three vessels had two fore-and-aft Voith-Schneider units, which had been successfully used on the fleet's 1972 Skye ferries. This propulsion system made the vessels fast and highly manoeuvrable compared to other vessels of the day, greatly reducing sailing and turnaround times and leading to them being nicknamed “Streakers”. The vessel incorporates a large open vehicle deck towards the stern, with passenger accommodation and services towards the bow across three decks. The design is of the roll-on/roll-off type, with vehicles boarding using either the stern ramp or one of the ramps amidships that lower to port and starboard respectively. She has two passenger lounges, one with a cafeteria. There is crew accommodation on the upper deck and open-air passenger areas. Unlike Jupiter and Juno, Saturns bridge was constructed one deck above the upper passenger deck, giving passenger access right around the front of the ship and allowing views directly over the bow. Saturn also did not have the large mast structure fitted above the car deck. History CalMac Service Together with her sister ships, Saturn formed a new generation of car ferries built in the 1970s to serve the routes on the Firth of Clyde. These ships were nicknamed the "Streakers" because of their greater speed (compared to what had served the area's routes previously) and superb manoeuvrability (due to their novel propulsion units). With "Rothesay Ferry" emblazoned on her hull, Saturn operated primarily on the Wemyss Bay – Rothesay crossing for much of her first decade. From 1986, a new rostering policy saw the three streakers switching between the Rothesay and Dunoon