sentences:  MV "Loch Seaforth", at 116m 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.