SS Dwinsk

	The ship as Rotterdam, in a painting by Fred Pansing
History
Name	1897: Rotterdam; 1906: C. F. Tietgen; 1913: Dwinsk;
Namesake	1897: Rotterdam; 1906: Carl Frederik Tietgen; 1913: Dwinsk, now Daugavpils;
Owner	1897: Holland America Line; 1906: Scandinavian America Line; 1913: Russian American Line; 1917: Shipping Controller;
Operator	1917: Cunard Line
Port of registry	1897 Rotterdam; 1906 Copenhagen; 1913 Libau; 1917 London;
Route	1897: Rotterdam – New York; 1906: Copenhagen – New York; 1914: Libau – New York; 1914: Archangel – New York;
Builder	Harland & Wolff, Belfast
Yard number	312
Laid down	16 May 1896
Launched	18 February 1897
Completed	29 July 1897
Maiden voyage	18 August 1897
Identification	1897: code letters WLJR; ; 1906: code letters NPRK; ; by 1913: call sign DCF; 1913: code letters IWAR; ; by 1914: call sign RDK; 1918: UK official number 142312; 1918: code letters JSKH; ;
Fate	Torpedoed and sunk by U-151, 18 June 1918
General characteristics
Type	1897: ocean liner; 1918: troop ship;
Tonnage	8,139 GRT, 5,160 NRT, 9,390 DWT
Length	470.3 ft (143.3 m)
Beam	53.2 ft (16.2 m)
Depth	22.3 ft (6.8 m)
Decks	3
Installed power	954 NHP, 5,500 ihp
Propulsion	2 × screws; 2 × triple-expansion engines;
Speed	15 knots (28 km/h)
Capacity	passengers, 1897: 212 × 1st class, 112 × 2nd class, 837 × 3rd class; passengers, as refitted: 191 × 1st class, 90 × 2nd class, 610 × 3rd class; cargo: 323,000 cu ft (9,100 m3) bale;
Armament	by 1918: defensively armed

SS Dwinsk was a transatlantic ocean liner that was launched in Ireland in 1897 as Rotterdam, renamed C. F. Tietgen in 1906, and renamed Dwinsk in 1913. A U-boat sank her in 1918, with the loss of 23 lives. The ship was built for Holland America Line (Nederlandsch-Amerikaansche Stoomvaart Maatschappij, or NASM), but was successively owned by Scandinavian America Line and Russian American Line, and after the Russian Revolution she was managed by Cunard Line.

She was the third of several NASM ships to be named after the city of Rotterdam. She was also the first ship that Harland & Wolff built for NASM.

History
The ship as Rotterdam, in a painting by Fred Pansing
Name	1897: Rotterdam 1906: C. F. Tietgen 1913: Dwinsk
Namesake	1897: Rotterdam 1906: Carl Frederik Tietgen 1913: Dwinsk, now Daugavpils
Owner	1897: Holland America Line 1906: Scandinavian America Line 1913: Russian American Line 1917: Shipping Controller
Operator	1917: Cunard Line
Port of registry	1897 Rotterdam 1906 Copenhagen 1913 Libau 1917 London
Route	1897: Rotterdam – New York 1906: Copenhagen – New York 1914: Libau – New York 1914: Archangel – New York
Builder	Harland & Wolff, Belfast
Yard number	312
Laid down	16 May 1896
Launched	18 February 1897
Completed	29 July 1897
Maiden voyage	18 August 1897
Identification	1897: code letters WLJR 1906: code letters NPRK by 1913: call sign DCF 1913: code letters IWAR by 1914: call sign RDK 1918: UK official number 142312 1918: code letters JSKH
Fate	Torpedoed and sunk by U-151, 18 June 1918
General characteristics
Type	1897: ocean liner 1918: troop ship
Tonnage	8,139 GRT, 5,160 NRT, 9,390 DWT
Length	470.3 ft (143.3 m)
Beam	53.2 ft (16.2 m)
Depth	22.3 ft (6.8 m)
Decks	3
Installed power	954 NHP, 5,500 ihp
Propulsion	2 × screws 2 × triple-expansion engines
Speed	15 knots (28 km/h)
Capacity	passengers, 1897: 212 × 1st class, 112 × 2nd class, 837 × 3rd class passengers, as refitted: 191 × 1st class, 90 × 2nd class, 610 × 3rd class cargo: 323,000 cu ft (9,100 m³) bale
Armament	by 1918: defensively armed