SMS U-35

SMS U-35
Ship name	SMS U-35
Ship class	U-31 class
Operator	Imperial German Navy
Ordered	1911
Builder	Germaniawerft
Laid down	1912
Launched	1914
Commissioned	1914
Fate	Surrendered 1918

SMS U-35

SMS U-35 was a German U-boat of the Imperial German Navy that operated during World War I. As one of the more successful submarines of the Kaiserliche Marine, she conducted patrols in the Atlantic Ocean, the Mediterranean Sea, and off the British Isles, impacting Royal Navy and merchant shipping operations. Her actions intersected with major figures and events of the war, influencing naval warfare debates and the development of submarine doctrine.

Design and Construction

U-35 was built at the German Empire's Kiel shipyards by Germaniawerft as part of the U-31 class program, alongside sister boats like U-31 and U-32. The design followed prewar trends established by Admiral Alfred von Tirpitz's naval expansion and the Second Naval Law industrialization, incorporating double-hull features pioneered after studies of HMS Dreadnought-era naval architecture. Her keel was laid in 1912 and she was launched in 1914, integrating diesel engines influenced by designs from MAN SE and electric motors similar to equipment used in contemporary Kaiserliche Werft vessels. Armament plans reflected lessons from engagements such as the Battle of Coronel and the evolving unrestricted submarine warfare debates associated with the Sussex incident and the Lusitania sinking controversies.

Service History

Following commissioning, U-35 joined torpedo and patrol flotillas that reported to the Kaiserliche Admiralität and participated in operations coordinated with squadrons based at Wilhelmshaven and Kiel. Her patrols were part of broader strategic maneuvers tied to the Northern Patrol and the Mediterranean U-boat campaign which brought U-boat activity into contact with fleets from the Royal Navy, the French Navy, and the Regia Marina. During service she operated under directives influenced by political pressures from the Reichstag and strategic guidance from commanders such as Konteradmiral Henning von Holtzendorff and officers within the U-Boot-Waffe. U-35's career spanned actions affecting the Grand Fleet's blockade efforts and merchant routes critical to United Kingdom logistics.

Operational Deployments and Engagements

U-35 conducted patrols in the North Sea, the Bay of Biscay, and the Mediterranean Sea, encountering convoys escorted by elements of the Grand Fleet and the British Home Fleet. Her engagements included attacks on steamers and transports that linked to campaigns like the Gallipoli Campaign and supply routes to France and Italy. During wartime operations she faced anti-submarine measures developed by the Royal Navy, including depth charge tactics refined after the Battle of Jutland and convoy defenses conceptualized by figures such as Admiral Sir John Jellicoe. Encounters with patrol vessels from the Royal Navy, French Navy, and United States Navy highlighted evolving countermeasures like hydrophone detection and the use of Q-ships exemplified by vessels involved in the Q-ship program.

Command and Crew

Commanding officers of U-35 included U-boat captains who were contemporaries of noted commanders such as Lothar von Arnauld de la Perière and Max Valentiner. The boat's complement operated within the U-boat flotilla organizational structure that also encompassed commanders like Karl Dönitz in later years of submarine strategy development. Crew training and standards reflected instruction at bases such as Heligoland and Flanders stations, with personnel exchanges influenced by staff from the Kaiserliche Werft Kiel and the U-Bootschule system. Life aboard included interactions with logistic networks involving supply points at Pola, Cattaro, and allied port facilities in the Austro-Hungarian Navy sphere.

Technical Specifications and Performance

As a U-31 class boat, U-35's specifications were comparable to sister ships like U-31: length overall roughly 64–67 metres, beam and draught consistent with early 20th-century coastal and oceanic submarines. Propulsion combined MAN SE diesel engines for surface cruising and electric motors for submerged operation, allowing operational speeds and ranges that influenced deployment choices against convoy systems. Armament typically included torpedo tubes and a deck gun reflecting tactical shifts after encounters with armed merchantmen and naval escorts; these choices were debated in doctrinal writings by figures such as Admiral Tirpitz and submarine advocates in the Reichsmarineamt. Survivability and habitability drew on submarine engineering practices shared with contemporaries in the Royal Navy and French Navy, while performance under depth-charge attack exposed limits that influenced interwar submarine design assessed by commissions like those convened after the Armistice of 11 November 1918.

Legacy and Historical Assessments

U-35's operational record contributed to historical assessments of the U-boat campaign (World War I) and informed postwar naval treaties such as provisions considered in the aftermath of the Treaty of Versailles. Scholarly analyses link her activities to debates in works by historians studying naval history, military strategy, and the legal controversies surrounding unrestricted submarine warfare that involved the United States and diplomatic episodes like the Zimmermann Telegram. Museums and archives in cities including Kiel, Hamburg, and London preserve documents and artifacts that contextualize U-boat operations. U-35 has been cited in comparative studies alongside other prominent submarines of the era for her operational impact on convoy doctrine, anti-submarine technology development, and the evolution of 20th-century naval conflict.

Category:Imperial German Navy submarines Category:U-31 class submarines