RMS Olympic was a British ocean liner and the lead ship of the White Star Line's trio of Olympic-class liners. Olympic had a career spanning 24 years from 1911 to 1935, in contrast to her short-lived sister ships, RMS Titanic and the Royal Navy hospital ship HMHS Britannic. This included service as a troopship with the name HMT Olympic during the First World War, which gained her the nickname "Old Reliable", and during which she rammed and sank the U-boat U-103.