Boat Armament Fate U-31 no deck gun lost in January 1915 in the North Sea - Discovered 2012 off the East Anglia Coast and identified September 2015 [4] U-32 two 8.8 cm guns, from 1916/17 one 10.5 cm gun sunk 5 May 1918 north-west of Malta U-33 one 8.8 cm gun, from 1916/17 one 10.5 cm gun surrendered 1919, scrapped U-34 one 8.8 cm gun, from 1916/17 one 10.5 cm gun sunk October 1918 in the Mediterranean Sea U-35 one 7.5 cm gun (1914), one 10.5 cm gun (1916) surrendered 1918, scrapped U-36 two 8.8 cm guns, from 1916/17 one 10.5 cm gun sunk 24 July 1915 west of Rona, Hebrides U-37 two 8.8 cm guns, from 1916/17 one 10.5 cm gun sunk by mine in April 1915 in the English Channel U-38 one 8.8 cm gun, from 1916/17 one 10.5 cm gun surrendered 1919, scrapped U-39 one 8.8 cm gun, from 1916/17 one 10.5 cm gun, from 1916/17 one 10.5 cm gun sunk 18 May 1918 off El Ferrol U-40 one 8.8 cm gun sunk 23 June 1915 in the North Sea U-41 one 8.8 cm gun sunk 24 September 1915 in the English Channel