Olympic-class ocean liner She has been, after the discovery, regularly seen as part of many other expeditions. In contrast to "Titanic", which lies at the very bottom of the North Atlantic and is being fed on by iron-eating bacteria, the "Britannic" is in remarkably good condition, and is much more accessible than her infamous sister. Many external structural features are still intact, including her propellers, and a great deal of her superstructure and hull. Museums and exhibitions pay tribute to the ships, and the two tragedies have inspired many movies, novels, and even musicals and video games. When decommissioned, "Olympic" was previously set
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