The home port of RMS. Lusitania.

No. 1 for information on the ship and her last Master,
Captain W.T. Turner.

The U20 was built in the Danzig Dockyard in 1913. She was 210 feet long, just 20 feet in the beam and her surface displacement was 650 tons . Submerged, her displacement was 837 tons.

She was propelled on the surface by two 850 horsepower Diesel engines. Whilst submerged, two 600 horsepower electric motors took over the job of driving her twin screws.

Her armament consisted of four 19.7 inch torpedo tubes, two in the bow and two in the stern, plus one 4.1 inch deck gun.
She carried a stock of six torpedoes on each patrol.

Although the U-boat featured in the above blueprint is of 1917 vintage and therefore of a later type than the U20, one can still obtain some idea of the general specifications and layout of a World War One German U-boat.


This is because the Germans had an excellent design in the "Germania" type boats originally developed by Krupp's, so they stuck with it.

Apart from size, armament and application, ocean-going German U-boats
deviated little from this basic design pattern throughout the Great War.

Kapitan-Leutnant Walther Schwieger.

Kapitan-Leutnant Walther Schwieger, by John Gray.

Born on 7th April 1885 to a noble family in Berlin, Walther von Schwieger (he personally disliked the "von" and refrained from using it) entered the Kaiserliche Marine as a Sea Cadet in 1903, at the age of 18 .

His initial training took place at the shore-based training establishment Stosch
and on 15th April, 1904 he was promoted to the rank of Fahnrich zur see, which was generally speaking, the Kaiserliche Marine's equivalent of the Royal Navy's Midshipman.

In 1905, he was sent on a special course at the Marineschule and upon his successful completion of the course, he was posted to a Naval Reserve vessel, the liner Braunschweig.

Torpedo division intake 1906 (Fahnrich zur see Schwieger bottom right)
collection of Greg & Mary Hitt

Modified close-up from same photo.
Lusitania Online/Greg & Mary Hitt.

He was posted to the Kaiserliche Marine's Torpedo Division in 1906 and in September of that year he was commissioned as a Leutenant zur see after which he served two years as a watch officer on torpedo boats, first the S105 and then G110.

On November 10th, 1908 he was promoted to the rank of Oberleutnant zur see and transferred to the light cruiser SMS Stettin.
In 1911, he transferred from SMS Stettin to the U-boote waffe (U-boat arm).

After serving as a Flaggleutnant on U14, Schwieger was promoted to the rank of Kapitan-Leutnant on September 19th, 1914. He took command of U20 at the end of December that year and soon proved to be a popular commander.

At the time he infamously sank the Lusitania on May 7th 1915, Schwieger was 30 years old.

After the storm of protest caused by the Lusitania disaster, the Kaiser called a halt to unrestricted submarine warfare. This caused a temporary lull in sinkings, though Schwieger and U-20 managed to sink the defensively armed White Star liner Cymric during this period. Unbeknownst to Schwieger,
the liner was carrying the body of one of the Lusitania victims home to America at the time.

On November 5th, 1916 whilst trying to assist another U-boat, the U20 ran aground in fog off the Danish coast.
She resisted all attempts to refloat her and during the attempt to rescue Schwieger and his crew, the German Battleship KronPrinz Wilhelm,
which was providing protective screening for the rescue operation,
was torpedoed by the British submarine J1.

The stranded U20 was therefore hastily blown up using one of her own torpedoes, to prevent her from falling into enemy hands.

The wreck of the U-20 off  Denmark, seen here after Schwieger's hasty attempt to blow her up.
Library of Congress. George Bain collection

KronPrinz Wilhelm limped back to base,
only to end her days at the bottom of Scapa Flow, in Scotland,
when the interned German warships scuttled themselves in a last great act of defiance in 1919.

The Danish government eventually removed the wreck of U20 some years later, as she was a hazard to navigation. The remains of U-20 are now a static display in Denmark, open to the public.

After U20 was lost, Schwieger was given command of the slightly larger U88 on April 7th, 1917 and on 30th July 1917, he was awarded Germany's highest decoration for gallantry; the "Pour Le Merite" medal, or "Blue Max" as it was more popularly known, in recognition of his having sunk a total of 190,000 tons of allied shipping.

He was the 8th U-boat commander to receive this covetted award.
The citation for his award did not mention his largest victim; the Lusitania.

The "Blue Max".

Schwieger was killed in action six weeks later, on September 5th 1917.
Whilst being pursued by the Q-Ship HMS Stonecrop, the submerged U88
struck a British laid mine off the Frisian island of Terschelling in the North Sea.

The British were quick to credit HMS Stonecrop with this "kill" as it made for good propaganda, but the mine that proved fatal to Schwieger was not laid by HMS Stonecrop at all, and she certainly had not fired upon U-88 with any effect during the chase.

Walther Schwieger was seven months short of his 33rd birthday when his worst nightmare became a reality.
There were no survivors from the U88, whose last recorded resting place is 53,57N - 04,55E.
At the time of his death, Schwieger ranked 6th in the league table of top-scoring U-boat commanders and was therefore officially a U-boat "Ace".

In May of 1918, the first boat of "Project 46" was launched.
Project 46 was a class of U-Cruiser and the very first was U139,
which was named "Kapitan-Leutnant Schwieger" in honour of his memory.

U20's "ship's bell" was finally returned to Germany by the Danish government in 1976.