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
Naval Vessel Register are gradually being added along with other updates. The NVR traces its origin back to the 1880s, having evolved from several previous publications. In 1911, the Bureau of Construction and Repair published "Ships Data US Naval Vessels", which subsequently became the "Ships Data Book" in 1952 under the Bureau of Ships. The Bureau of Ordnance's "Vessel Register", first published in 1942 and retitled "Naval Vessel Register", was combined with the "Ships Data Book" under the Bureau of Ships in 1959. Since 1962, the NVR has been maintained and published by the NAVSEA Shipbuilding Support Office (NAVSHIPSO) of the Naval Sea