"Olympic" was the slightly older sister of "Titanic", built alongside the more famous vessel but launched in October 1910. Her exterior profile was nearly identical to "Titanic", save for minor details such as the number of portholes on the forward C decks of the ships, the spacing of the windows on the B decks, and the forward section of the A deck promenade on "Titanic" that had been enclosed only a few weeks before she set sail on her ill-fated maiden voyage. Both ships were built with linoleum floors, but shortly before she was due to set sail J. Bruce Ismay, managing director of the White Star Line, inexplicably ordered the floors aboard "Titanic" carpeted over.