operated between Ardrossan and Brodick on Arran. She normally undertakes up to 5 crossings a day in each direction, leaving Ardrossan at 0700, 0945, 1230, 1515 and 1800, and leaving Brodick at 0820, 1105, 1355, 1640 and 1920. The 1920 Saturday departure was removed during the winter 2016/2017 timetable to facilitate a 0820 sailing from Brodick on Sunday, where a crew safety drill has been a normal occurrence since October 2016. During the period of the summer timetable there is an additional sailing on Friday evenings, leaving Ardrossan at 2030, returning from Brodick at 2140. Due to the demand for capacity, a second ferry has supplemented Caledonian Isles during the summer season since 2005. This peak summer service originally operated between June and August however, due to demand, operates from May to September since 2013. The additional service was provided by from 2005 until 2011, and by from 2012. During the summer 2012 period, the capacity was limited to 12 passengers for HGV drivers during the week, whilst a full passenger service was provided on Saturdays. From May to September 2013, could carry its full capacity throughout the week, doubling the service to Arran from Monday to Wednesday. Isle of Arran undertook services from Ardrossan to Campbeltown on Thursday, Friday and Sunday, returning on Friday, Saturday (via Brodick) and Sunday, whilst still operating from Ardrossan to Arran outwith its Campbeltown sailings. On first coming into service, Caledonian Isles usually berthed overnight at Ardrossan in the summer and at Brodick in the winter timetable. Now, she usually berths overnight at Ardrossan all year. During periods of adverse weather, it is not uncommon for the vessel to berth overnight at Brodick, with either cancellation of the 1920 service from Brodick, or a return to Brodick after the 1920 eastbound sailing. The 0700 sailing from Ardrossan the following morning is then cancelled. During adverse weather conditions, Caledonian Isles has been diverted to Gourock. This happened on 4 January 2012, following storm damage to the linkspan at Ardrossan. In February 2012, Caledonian Isles was in dry-dock to repair damage sustained in a collision with Winton Pier, Ardrossan. She was relieved by Isle of Arran which was often diverted to Wemyss Bay and Gourock. In February 2014, once again relieved Caledonian Isles after she broke down. In April 2015, had problems with her prop shaft which delayed the introduction of her additional Arran summer sailings,