RMS Olympic and sold at auction before she was scrapped, and now adorn buildings and a cruise ship. By contrast with "Olympic", the other two ships in the class, "Titanic" and , did not have long service lives. "Titanic" collided with an iceberg in the North Atlantic on her maiden voyage and sank, while "Britannic" struck a mine and sank in the Kea Channel in Greece in 1916. "Britannic" never served her intended role as a passenger ship. Built in Belfast, Ireland, "Olympic" was the first of the three s – the others were and . They were by far the largest
Sister ship American sister ships and , and the German Hindenburg class airship's "Hindenburg" and "Graf Zeppelin II". The generally accepted commercial distinctions of a "sister ship" are the following: The critical overriding criteria are the same hull design. For example, the popular TESS-57 standard design built by Tsunishi Shipbuilding are built in Japan, China, and the Philippines. All the ships of this design are classed as "sister ships". The International Maritime Organization defined "sister ship" in IMO resolution MSC/Circ.1158 in 2006. Criteria included these: Sister ship A sister ship is a ship of the same class or of virtually identical design