RMS Olympic to Belfast where the passengers disembarked. Following "Olympic"s return to Britain, the White Star Line intended to lay her up in Belfast until the war was over, but in May 1915 she was requisitioned by the Admiralty, to be used as a troop transport, along with the Cunard liners and . The Admiralty had initially been reluctant to use large ocean liners as troop transports because of their vulnerability to enemy attack, however a shortage of ships gave them little choice. At the same time, "Olympic"s other sister ship "Britannic", which had not yet been completed, was requisitioned as a
Olympic-class ocean liner began in 1911 after the commissioning of "Olympic" and "Titanic" launch. Following the sinking of "Titanic", the two remaining vessels underwent many changes in their safety provisions. All three of the "Olympic"-class ships had nine decks, seven of which were for passenger use. From top to bottom, the decks were: Propulsion was achieved through three propellers: two outboard or wing propellers had three blades, while the central propeller had four. The two lateral propellers were powered by reciprocating steam triple expansion, while the central shaft was driven by a steam turbine. All power on board was derived from a total