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U70

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U66 (ex-U7)		203	Germaniawerft, Kiel	1913	22.4.1915	7.1915	lost 3.9.1917
U67 (ex-U8)		204	Germaniawerft, Kiel	1913	15.5.1915	8.1915	to United Kingdom 11.1918
U68 (ex-U9)		205	Germaniawerft, Kiel	1913	1.6.1915	8.1915	sunk 22.3.1916
U69 (ex-U10)		206	Germaniawerft, Kiel	1913	24.6.1915	9.1915	lost 24.7.1917
U70 (ex-U11)		207	Germaniawerft, Kiel	1913	20.7.1915	9.1915	to United Kingdom 11.1918

Technical data

Displacement standard, t
Displacement normal, t	791 / 933
Length, m	69.5
Breadth, m	6.30
Draught, m	3.79
No of shafts	2
Machinery	U66, 67: 2 Germania diesels / 4 SSW electric motors U68: 70: 2 Germania diesels / 4 Pichler electric motors
Power, h. p.	2300 / 1240
Max speed, kts	16.8 / 10.3
Fuel, t	diesel oil 87
Endurance, nm(kts)	7370(8) / 115(5)
Armament	1 x 1 - 88/27 TK L/30 C/08, 5 - 450 TT (4 bow, 1 stern, 12)
Complement	36
Diving depth operational, m	50

Graphics

Project history

Originally ordered as U7-11 for the Austro-Hungarian Navy, these UD type boats were built by Germaniawerft, and were purchased by Germany on 28 November 1914. Redesigned and reconstructed to German standards they were commissioned into the Imperial German Navy. Compared with other Austrian submarines of the time, without doubt these units would have been the best. Double-hull construction.

Modernizations

1916-1917, all: - 1 x 1 - 88/27; + 1 x 1 - 105/43 TK L/45 C/16

mid-1918, all: - 1 x 1 - 88/27

Naval service

U66 was lost by unknown cause after 3.9.1917 in the North Sea. U68 was sunk W of Dunmore Head by gunfire of British decoy vessel Farnborough 22.3.1916.