	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.