The flotilla operated mainly in the North Sea and against the Russian bound JW-, PQ-, QP- und RA convoys in the Arctic Sea.
U-boat | Show Boat | 11th United States Congress | flying boat | The Love Boat | 11th | 11th arrondissement of Marseille | Michigan's 11th congressional district | 11th parallel north | Special Boat Service | Three Men in a Boat | PT boat | flotilla | Motor Torpedo Boat | Lady Margaret Boat Club | Dave Boat | boat | torpedo boat | patrol boat | Flotilla | Richard FitzAlan, 11th Earl of Arundel | Edward St Maur, 11th Duke of Somerset | Dragon boat | American Power Boat Association | The Boat Race | Inflatable boat | Herbrand Russell, 11th Duke of Bedford | First and Third Trinity Boat Club | 11th Hussars | Vietnamese boat people |
In May 1937 the unit moved to Neustadt and was redesignated as the Unterseebootsschulflottille, ("U-boat School Flotilla"), commanded by Kapitänleutnant Heinz Beduhn.
29th U-boat Flotilla ("29. Unterseebootsflottille") was formed in December 1941 in La Spezia in Italy under the command of Korvettenkapitän Franz Becker.
The flotilla was based in Kiel for the first few weeks after its formation, but was later moved to Wilhelmshaven, where it remained until May 1940.
The boats then traveled at an average speed of 5 mph over the Reichsautobahn (modern day A4 and A9) to the slipway in Ingolstadt.
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It was decided that small vessels, torpedo boats and U-boats, should be transported from the German bight via the Danube to the Black Sea.
In the Mediterranean, U-617 was assigned to 29th U-boat Flotilla, located in La Spezia and Toulon and commanded by Fritz Frauenheim.
As flotilla engineer in the 29th U-boat Flotilla (1 June 1942 – 31 January 1944) in La Spezia and Toulon and later in the 5th U-boat Flotilla, Zürn introduced a number of improvements which helped the flotilla operate at peak efficiency.
After training with the 8th U-boat Flotilla at Danzig, U-343 was transferred to the 3rd U-boat Flotilla, based at La Pallice in France, for front-line service on 1 November 1943, and then to the 29th U-boat Flotilla, based at Toulon on the Mediterranean coast, on 1 February 1944.