Postcard depicting U-20 sinking RMS Lusitania. |
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| Career (German Empire) | |
|---|---|
| Name: | U-20 |
| Ordered: | 25 November 1910 |
| Builder: | Kaiserliche Werft, Danzig |
| Laid down: | 7 November 1911 |
| Launched: | 18 December 1912 |
| Commissioned: | 5 August 1913 |
| Fate: | Grounded 4 November 1916 and blown up by her crew the next day. |
| General characteristics | |
| Class and type: | German Type U 19 submarine |
| Displacement: | 650 tons surfaced, 837 tons submerged[1] |
| Length: | 64.2 m (210.6 ft)[2] |
| Beam: | 6.1 m (20.0 ft)[3] |
| Draught: | 3.6 m (11.8 ft)[4] |
| Speed: | •28.7 km/h (15.5 kn) surfaced[5] •17.6 km/h (9.5 kn) submerged[6] |
| Range: | 9,800 km (5,300 nmi) at 15 km/h (8.1 kn)[7] |
| Armament: | •four 50 cm (19.7 in) torpedo tubes[8] (two bow, two stern, nine torpedoes)[9] •1 x 88 mm (3.46 in) deck gun (two from 1916 on)[10] |
| Service record | |
| Part of: | Kaiserliche Marine: III Flottille |
| Commanders: | Otto Dröscher 1 Aug, 1914 - 15 Dec, 1914 Walther Schwieger 16 Dec, 1914 - 5 Nov, 1916[11] |
| Operations: | 7 |
| Victories: | 36 ships sunk for a total of 144.300 tons, including RMS Lusitania. |
SM U-20 was a German Type U 19 U-boat built for service in the Kaiserliche Marine. She was launched on 18 December 1912, and commissioned on 5 August 1913. During World War I, she took part in operations around the British Isles. The U-20 became infamous following her sinking of the British ocean liner RMS Lusitania on 7 May 1915, an act that dramatically reshaped the course of World War I.
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On 7 May 1915, U-20 was patrolling off the southern coast of Ireland under the command of Kapitänleutnant Walther Schwieger. Three months earlier, on 4 February, the Germans had established a U-boat blockade around the United Kingdom and had declared any vessel in it a legitimate target.
At about 1:40 pm Schwieger saw a vessel approaching through his periscope. From a distance of about 700 m Schwieger noted she had four funnels and two masts making her a liner of some sort. He recognised her as the Lusitania, a vessel in the British Fleet Reserve, and fired a single torpedo. It hit on the starboard side, almost directly below the bridge. Following the torpedo's explosion, the liner was shattered by a second explosion, possibly caused by coal dust, munitions in the hold, or a boiler explosion, so large Schwieger himself was surprised. Lusitania sank rapidly in 18 minutes with the loss of nearly 1,200 lives.
Fifteen minutes after he had fired his torpedo, Schwieger noted in his war diary:
There was at the time and remains now a great controversy about the sinking, over whether Lusitania was smuggling contraband war material to England and over the number of torpedoes Schwieger fired.
Before he got back to the docks at Wilhelmshaven for refuelling and resupply, the United States had formally protested to Berlin against the brutality of his action.
Kaiser Wilhelm II wrote in the margins of the American note, "Utterly impertinent", "outrageous", and "this is the most insolent thing in tone and bearing that I have had to read since the Japanese note last August." Nevertheless, to keep America out of the war, in June the Kaiser was compelled to rescind unrestricted submarine warfare and require all passenger liners be left unmolested.
On 4 September 1915 Schwieger was back at sea with U-20, eighty-five miles off the Fastnet Rock in the south Irish Sea. This rock held one of the key navigational markers in the western ocean, the Fastnet Lighthouse, and any ships passing in and out of the Irish Sea, would be within visual contact of it.
RMS Hesperian was now beginning a new run outward bound from Liverpool to Quebec and Montreal, with a general cargo, also doubling as a hospital ship, and carrying about 800 passengers. She was attacked off the Fastnet, a landmark islet in the north Atlantic, off the south-west coast of Ireland. The "History of the Great War: The Merchant Navy, Vol. II", by Hurd, reads:
This time, Schwieger was received with official disgust upon his return to Wilhelmshaven. Ordered to report to Berlin to explain himself, he was required to apologise for having sunk another passenger liner in defiance of a direct order not to do so again. He complained about his treatment in Berlin thereafter.
After his death in 1917, Schwieger was forgiven in Berlin. He received Germany's highest decoration, the Pour le Mérite, having sunk by that time 190,000 tons of ships.
On 4 November 1916 U-20 grounded on the Danish coast around position at Vrist, a little north of Thorsminde. Her crew destroyed her in an explosion the following day.[12]
After the explosion, the Danish navy removed the deck gun and made it unserviceable by cutting holes in vital parts. The gun was kept in the naval stores at Holmen in Copenhagen for almost 80 years. It is now on display at the Strandingsmuseum St. George Thorsminde.
Novelist Clive Cussler claims his National Underwater and Marine Agency (NUMA) located the remains of U-20 in 1984.[13]
The following is a verbatim transcription of the recorded activities of SM U-20 known to British Naval Intelligence, Room 40 O.B.:[14]
"SM U-20.
Kaptlt. Dröscher, October 1914, later to U-78; Kaptlt. Schwieger in April 1915, later to U-88. Completed at Danzig before the war and subsequently joined the 3rd Half Flotilla.
Note: S.S. = Steam Ship; S.V. = Sailing Vessel; northabout, Muckle Flugga, Fair I. = around Scotland; Sound, Belts, Kattegat = via North of Denmark to/from German Baltic ports; Bight = to/from German North Sea ports; success = sinking of ships
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