[2] The ship had twin screws, each driven by a three-cylinder triple-expansion steam engine.

The combined power of her twin engines was rated at 954 NHP[3] or 5,500 ihp, and gave her a speed of 15 knots (28 km/h).

[4] On 28 June 1906 C. F. Tietgen collided with the 70-foot (21.3 m), 63 GRT US schooner E. C. Hay in the North River off the Desbrosses Street Ferry terminal in New York City.

[7] On 7 July 1910 she left Copenhagen on a cruise to the North Cape, calling at Bergen and Trondheim.

She was registered in Libau (now Liepāja in Latvia), her code letters were IWAR,[10] and her wireless telegraph call sign was RDK.

[4] After the October Revolution in the Russian Empire, the United Kingdom government seized Dwinsk.

[12] On 18 June 1918 Dwinsk was making 13 knots (24 km/h) en route from Brest, France to the USA.

At about 09:20 hrs U-151 fired a torpedo at her about 400 nautical miles (740 km) north of Bermuda.

Her helm was put hard to port, but the torpedo hit her and exploded in her number 4 hold.

The U-boat remained in the area, waiting to attack any ship that came to rescue survivors.

On 21 June the westbound troop ship USS Siboney found two of Dwinsk's boats and rescued their occupants.

[13] In January 1919 Dwinsk's Chief Officer, Robert Pritchard, and Boatswain's Mate, Philip Larbalastier, were awarded the Distinguished Service Medal[17] for their "good seamanship, management and fortitude" in command of their respective boats.