A troubled Scottish ferry needs new propellors as part of multi-million pound repairs after just over a year in service, MSPs have heard. Shipyard bosses told a Holyrood committee that repair costs for the Glen Sannox could hit £3.2m after a small crack was discovered in the hull. Ferguson Marine chief executive, Graeme Thomson, said that extra steel had been added to strengthen the CalMac vessel, but only new propellors would tackle "the root cause" of the crack. "There is an opportunity to improve the design of the propellers," he told Holyrood's net zero, energy and transport committee on Tuesday. Glen Sannox began serving the Isle of Arran in the Firth of Clyde in January 2025, seven years late and four times over budget. The 336ft (102m) vessel, with space for 127 cars and 852 passengers, was the first major new ferry to join the fleet off the west of Scotland in a decade.…