MV "Loch Seaforth", at in length the largest vessel in the fleet, operates on the Ullapool to Stornoway, Lewis crossing. has the highest passenger capacity and can carry 1000 people on the Ardrossan to Brodick, Arran crossing. crosses The Minch from Uig, Skye, while , and are based in Oban, serving Mull, Coll, Colonsay, Tiree and the Outer Hebrides. is based in Mallaig and serves Armadale and South Uist. and serve Islay from Kennacraig. During the summer, , replaced at Islay in 2011, supplements the Ardrossan - Brodick service and sails to Campbeltown. She is a spare vessel during the winter months.