Please note, the Irish Ferrys 'Biggest car ferry' The Ulysses, is only the biggest car ferry by lane meters only in other words, by the length in meters of all her vehicle lanes put together, The Stena Adventurer (which runs on the same route) is actually bigger in length than The Ulysses, as the Ulysses is 209,02m in length, while the Adventurer is 211,56 m in length. However the Ulysses has got a bigger gross tonnage, so i suppose its a matter of debate, but never the less, they are both great vessles.