on 21 august 1917, "oslo" was en route from trondheim, norway to liverpool, united kingdom while carrying passengers, crew and a cargo of copper ore. "oslo" was struck by a torpedo from in the north sea, 15 nautical miles (28 km) east by north of the out skerries, shetland islands. the ship sank to a depth of over , along with her cargo, one passenger and two firemen. it is unknown how many survived the sinking.