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
Olympic-class ocean liner minelayer submarine in a barrier off Kea in the Aegean Sea during World War I. "Olympic", the lead vessel, had a career spanning 24 years and was retired in 1934 and sold for scrapping in 1935. Although the two younger vessels did not have successful careers, they are among the most famous ocean liners ever built. Both "Olympic" and "Titanic" briefly enjoyed the distinction of being the largest ships in the world; "Olympic" would be the largest British-built ship in the world for over 20 years until the launch of in 1936. "Titanic"s story has been adapted into many books