NAVYPEDIA

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UB40 1916

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
UB18		248	Blohm & Voss, Hamburg	1915	21.8.1915	12.1915	sunk 9.12.1917
UB19		249	Blohm & Voss, Hamburg	1915	2.9.1915	12.1915	sunk 30.11.1916
UB20		250	Blohm & Voss, Hamburg	1915	26.9.1915	2.1916	sunk 29.7.1917
UB21		251	Blohm & Voss, Hamburg	1915	26.9.1915	2.1916	to United Kingdom 11.1918
UB22		252	Blohm & Voss, Hamburg	1915	9.10.1915	3.1916	sunk 19.1.1918
UB23		253	Blohm & Voss, Hamburg	1915	9.10.1915	3.1916	interned 29.7.1917, to France 2.1919
UB24		238	Weser, Bremen	1915	18.10.1915	11.1915	to France 11.1918
UB25		239	Weser, Bremen	1915	22.11.1915	12.1915	to United Kingdom 11.1918
UB26		240	Weser, Bremen	1915	14.12.1915	1.1916	sunk 5.4.1916, later to France (Roland Morillot)
UB27		241	Weser, Bremen	1915	10.2.1916	2.1916	sunk 29.7.1917
UB28		242	Weser, Bremen	1915	20.12.1915	12.1915	to United Kingdom 11.1918
UB29		243	Weser, Bremen	1915	31.12.1915	1.1916	sunk 13.12.1916
UB30		254	Blohm & Voss, Hamburg	1915	16.11.1915	3.1916	wrecked 23.2.1917, interned by Netherlands, returned 8.1917, sunk 13.8.1918
UB31		255	Blohm & Voss, Hamburg	1915	16.11.1915	3.1916	sunk 2.5.1918
UB32		256	Blohm & Voss, Hamburg	1915	4.12.1915	4.1916	sunk 22.9.1917
UB33		257	Blohm & Voss, Hamburg	1915	4.12.1915	4.1916	sunk 11.4.1918
UB34		258	Blohm & Voss, Hamburg	1915	28.12.1915	6.1916	to United Kingdom 11.1918
UB35		259	Blohm & Voss, Hamburg	1915	28.12.1915	6.1916	sunk 26.1.1918
UB36		260	Blohm & Voss, Hamburg	1915	15.1.1916	5.1916	sunk 21.5.1917
UB37		261	Blohm & Voss, Hamburg	1915	28.12.1915	5.1916	sunk 14.1.1917
UB38		262	Blohm & Voss, Hamburg	1915	1.4.1916	7.1916	sunk 8.2.1918
UB39		263	Blohm & Voss, Hamburg	1915	29.12.1915	4.1916	sunk 15.5.1917
UB40		264	Blohm & Voss, Hamburg	1915	25.4.1916	8.1916	scuttled 5.10.1918
UB41		265	Blohm & Voss, Hamburg	1915	6.5.1916	8.1916	sunk 5.10.1917
UB42		244	Weser, Bremen	1915	4.3.1916	3.1916	Austrian flag 1916 (U42), to United Kingdom 11.1918
UB43		245	Weser, Bremen	1915	8.4.1916	4.1916	Austrian flag 1916 (U43), to Austria-Hungary 7.1917 (U43), to Italy 11.1918
UB44		246	Weser, Bremen	1915	20.4.1916	5.1916	Austrian flag 1916 (U44), sunk 4.8.1916
UB45		247	Weser, Bremen	1915	12.5.1916	5.1916	Austrian flag 1916 (U45), sunk 6.11.1916
UB46		248	Weser, Bremen	1915	31.5.1916	6.1916	Austrian flag 1916 (U46), sunk 7.12.1916
UB47		249	Weser, Bremen	1915	17.6.1916	7.1916	Austrian flag 1916 (U47), to Austria-Hungary 7.1917 (U47), to France 1920

Technical data

Displacement standard, t
Displacement normal, t	UB18 - 23, 36, 38 - 41: 263 / 292 UB24 - 29: 265 / 291 UB30 - 35, 37: 274 / 303 UB42: 279 / 305 UB43 - 47: 272 / 305
Length, m	UB18 - 29, 36, 38 - 41: 36.1 UB30 - 35, 37, 42 - 47: 36.9
Breadth, m	UB18 - 29, 36, 38 - 41: 4.36 UB30 - 35, 37, 42 - 47: 4.37
Draught, m	UB18 - 23, 36, 38 - 41: 3.70 UB24 - 29: 3.66 UB30 - 35, 37: 3.75 UB43 - 47: 3.68
No of shafts	2
Machinery	UB18, 19, 26, 29, 42 - 47: 2 Daimler diesels / 2 SSW electric motors UB20 - 23, 36, 38 - 41: 2 Körting diesels / 2 SSW electric motors UB24, 25, 27, 28, 30 - 35, 37: 2 Benz diesels / 2 SSW electric motors
Power, h. p.	UB18 - 23, 26, 29, 36, 38 - 47: 284 / 280 UN24, 25, 27, 28, 30 - 35, 37: 270/280
Max speed, kts	UB18 - 23, 36, 38 - 41: 9.2 / 5.8 UB24 - 29: 8.9 / 5.7 UB30 - 35, 37: 9.1 / 5.7 UB42 - 47: 8.8 / 6.2
Fuel, t	UB18 - 41: diesel oil 28 UB42 - 47: diesel oil 27
Endurance, nm(kts)	UB18, 19: 6650(5) / 45(5) UB20 - 23, 36, 38 - 41: 6450(5) / 45(4) UB24 - 29: 7200(5) / 45(4) UB30 - 35, 37: 7030(5) / 45(4) UB42 - 47: 6940(5) / 45(4)
Armament	UB18 - 29: 1 x 1 - 50/37 SK L/40 C/92, 2 - 500 TT (bow, 4) UB30 - 47: 1 x 1 - 88/27 TK L/30 C/08, 2 - 500 TT (bow, 4)
Complement	23
Diving depth operational, m	50

Standard scale images

Graphics

Project history

UB II type coastal submarines of single hull construction with saddle tanks. They had a diving time which varied from 45 seconds in the Blohm & Voss boats to 30 seconds in the UB24-UB29 group.

Modernizations

1916, all survived: carried 6 torpedoes.

1916, UB21, 22, 27, 34, 35, 41: + 2 - 500 TT (stern, 2), bow TTs were converted for minelaying (14 P mines).

1916-1917, UB18, 21-25, 27: - 1 x 1 - 50/37; + 1 x 1 - 88/27 TK L/30 C/08

1917, UB24: - 1 x 1 - 88/27; + 1 x 1 - 50/37 SK L/40 C/92

Naval service

UB43 and UB41, sold to Austria-Hungary in 1917, were commissioned as the Austrian U43 and U47, ceded to Italy after the war and scrapped. Of those lost in action UB26 (5.4.1916 she wrecked on harbour obstructions at Le Havre) was raised, became the French Roland Morillot, and was scrapped in 1931. UB23 was interned 29.7.1917 at La Coruña in Spain after she was damaged by depth charges from British patrol boat P60, but also became a French reparation and was scrapped. UB24, UB25, UB28 and UB42 became British war reparations and were scrapped. UB40 was scuttled 5.10.1918 at Ostend during the German retreat from Flanders. UB18 was rammed by British trawler Ben Lawers 9.12.1917 in the English Channel. UB19 was sunk by British decoy vessel Penshurst 30.11.1916 in the English Channel. UB20 was mined 29.7.1917 off Flanders coast. UB22 was mined 19.1.1918 in the North Sea. UB25 sank 19.3.1917 at Kiel after collision with destroyer V26 but salvaged 22.3.1917 and later recommissioned. UB27 was sunk by ramming and depth charges of British sloop Halcyon 29.7.1917 in the North Sea. UB29 was sunk 13.12.1916 in the English Channel by drifting mines and British destroyer Landrail. UB30 wrecked 23.2.1917 at Walcheren Island, salvaged by Dutch, interned but returned to Germany 8.8.1917; finally she was sunk 13.8.1918 in the North Sea by British trawler John Gillman. UB31 was sunk 2.5.1918 in the English Channel by British trawlers Lord Leitrim, Loyal Friend and Ocean Roamer. UB32 was bombed by British aircraft 22.9.1917 in the English Channel. UB33 was mined 11.4.1918 in the English Channel. UB35 was sunk by British destroyer Leven and patrol boats 26.1.1918 in the English Channel. UB36 was rammed by French s/s Molière 21.5.1917 in the English Channel. UB37 was sunk by British decoy vessel Penshurst 14.1.1917 in the English Channel. UB38 was mined 8.2.1918 in the English Channel. UB39 was mined 15.5.1917 in the English Channel. UB41 was stricken by German mine 5.10.1917 in the North Sea. UB44 was sunk by British patrol vessels Quarrie, Knowe and Garrigill 4.8.1916 in the Ionic Sea. UB45 was mined 6.11.1916 in the Black Sea. UB46 was mined 7.12.1916 in the Black Sea.