White Star Line naval mine, while in service as a hospital ship. "Britannic" was the largest loss for the company, and also the largest ship sunk during the conflict. 1916 also saw the loss of the liner "Cymric" which was torpedoed off the Irish coast in May, and also of the cargo ship "Georgic", which was scuttled in December with its cargo of 1,200 horses still on board, after being intercepted in the Atlantic by the German merchant raider . 1917 saw the loss of the liner "Laurentic" in January which struck a mine off the Irish coast and sank with the loss
Sister ship an . The most famous sister ships were the White Star Line's , and . As with some other liners, the sisters worked as running mates. Other sister ships include the Royal Caribbean International's and . "Half-sister" refers to a ship of the same class but with some significant differences. One example of half-sisters are the First World War-era British s where the first two ships had four guns, but the last ship, , had two guns instead. Another example is the American s of the Second World War that came in "long-hull" and "short-hull" versions. Notable airships include the