Olympic-class ocean liner of 29 coal-fired steam boilers in six compartments. However, "Olympic"s boilers were adapted for firing by oil at the end of the First World War, which reduced the number of engine crew required from 350 to 60. The "Olympic"-class ships were long, displacing normally (their draft at this displacement being ), and their tonnage was around 45-46,000 GRT. "Olympic" became the largest ship in the world when it was completed in May, 1911 before losing the title to its sister "Titanic" when she was completed in April, 1912. After the loss of "Titanic" the third sister ship "Britannic" claimed the
RMS Olympic for meals and entertainment. The second-class facilities included a smoking room, a library, a spacious dining room, and a lift. Finally, the third-class passengers enjoyed reasonable accommodation compared to other ships, if not up to the second and first classes. Instead of large dormitories offered by most ships of the time, the third-class passengers of "Olympic" travelled in cabins containing two to ten bunks. Facilities for the third class included a smoking room, a common area, and a dining room. "Olympic" had a cleaner, sleeker look than other ships of the day: rather than fitting her with bulky exterior air