NAVYPEDIA

Photo

Hai 1957  

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U2321		475	Deutsche Werft, Hamburg	3.1944	17.4.1944	6/1944	surrendered 5.1945, scuttled 27.11.1945
U2322		476	Deutsche Werft, Hamburg	3.1944	30.4.1944	7/1944	surrendered 5.1945, scuttled 27.11.1945
U2323		477	Deutsche Werft, Hamburg	4.1944	31.5.1944	7/1944	sunk 26.7.1944
U2324		478	Deutsche Werft, Hamburg	4.1944	16.6.1944	7/1944	surrendered 5.1945, scuttled 27.11.1945
U2325		479	Deutsche Werft, Hamburg	4.1944	13.7.1944	8/1944	surrendered 5.1945, scuttled 28.11.1945
U2326		480	Deutsche Werft, Hamburg	5.1944	17.7.1944	8/1944	surrendered 5.1945, to United Kingdom 5.1945 (N35)
U2327		481	Deutsche Werft, Hamburg	5.1944	29.7.1944	8/1944	scuttled 2.5.1945
U2328		482	Deutsche Werft, Hamburg	5.1944	7.8.1944	8/1944	surrendered 5.1945, scuttled 27.11.1945
U2329		483	Deutsche Werft, Hamburg	6.1944	11.8.1944	9/1944	surrendered 5.1945, scuttled 28.11.1945
U2330		484	Deutsche Werft, Hamburg	6.1944	19.8.1944	9/1944	scuttled 3.5.1945
U2331		485	Deutsche Werft, Hamburg	6.1944	22.8.1944	9/1944	scuttled 3.5.1945
U2332		941	Germaniawerft, Kiel	9.1944	18.10.1944	11/1944	scuttled 2.5.1945
U2333		942	Germaniawerft, Kiel	9.1944	16.11.1944	12/1944	scuttled 5.5.1945
U2334		488	Deutsche Werft, Hamburg	7.1944	26.8.1944	9/1944	surrendered 5.1945, scuttled 28.11.1945
U2335		489	Deutsche Werft, Hamburg	7.1944	31.8.1944	9/1944	surrendered 5.1945, scuttled 28.11.1945
U2336		490	Deutsche Werft, Hamburg	7.1944	10.9.1944	9/1944	surrendered 5.1945, scuttled 3.1.1946
U2337		491	Deutsche Werft, Hamburg	8.1944	15.9.1944	10/1944	surrendered 5.1945, scuttled 28.11.1945
U2338		492	Deutsche Werft, Hamburg	8.1944	18.9.1944	10/1944	sunk 4.5.1945
U2339		493	Deutsche Werft, Hamburg	8.1944	22.9.1944	11/1944	scuttled 5.5.1945
U2340		494	Deutsche Werft, Hamburg	8.1944	28.9.1944	10/1944	sunk 30.3.1945
U2341		495	Deutsche Werft, Hamburg	8.1944	3.10.1944	10/1944	surrendered 5.1945, scuttled 31.12.1945
U2342		496	Deutsche Werft, Hamburg	8.1944	13.10.1944	11/1944	sunk 26.12.1944
U2343		497	Deutsche Werft, Hamburg	8.1944	18.10.1944	11/1944	scuttled 5.5.1945
U2344		498	Deutsche Werft, Hamburg	9.1944	24.10.1944	11/1944	collision 18.2.1945
U2345		499	Deutsche Werft, Hamburg	9.1944	28.10.1944	11/1944	surrendered 5.1945, scuttled 27.11.1945
U2346		500	Deutsche Werft, Hamburg	9.1944	31.10.1944	11/1944	scuttled 5.5.1945
U2347		501	Deutsche Werft, Hamburg	9.1944	6.11.1944	12/1944	scuttled 5.5.1945
U2348		502	Deutsche Werft, Hamburg	9.1944	11.11.1944	12/1944	surrendered 5.1945, to United Kingdom 6.1945, BU 4.1949
U2349		503	Deutsche Werft, Hamburg	9.1944	20.11.1944	12/1944	scuttled 5.5.1945
U2350		504	Deutsche Werft, Hamburg	9.1944	22.11.1944	12/1944	surrendered 5.1945, scuttled 28.11.1945
U2351		505	Deutsche Werft, Hamburg	10.1944	25.11.1944	12/1944	stricken 4.1945, scuttled 3.1.1946
U2352		506	Deutsche Werft, Hamburg	10.1944	5.12.1944	1/1945	scuttled 5.5.1945
U2353		507	Deutsche Werft, Hamburg	10.1944	6.12.1944	1/1945	surrendered 5.1945, to United Kingdom 5.1945 (N31), to Soviet Union 1947 (М-31 [M-31])
U2354		508	Deutsche Werft, Hamburg	10.1944	10.12.1944	1/1945	surrendered 5.1945, scuttled 22.12.1945
U2355		509	Deutsche Werft, Hamburg	10.1944	13.12.1944	1/1945	scuttled 3.5.1945
U2356		510	Deutsche Werft, Hamburg	10.1944	19.12.1944	1/1945	surrendered 5.1945, scuttled 6.1.1946
U2357		511	Deutsche Werft, Hamburg	10.1944	20.12.1944	1/1945	scuttled 5.5.1945
U2358		512	Deutsche Werft, Hamburg	11.1944	22.12.1944	1/1945	scuttled 5.5.1945
U2359		513	Deutsche Werft, Hamburg	11.1944	23.12.1944	1/1945	sunk 2.5.1945
U2360		514	Deutsche Werft, Hamburg	11.1944	29.12.1944	1/1945	scuttled 5.5.1945
U2361		515	Deutsche Werft, Hamburg	11.1944	3.1.1945	2/1945	surrendered 5.1945, scuttled 27.11.1945
U2362		516	Deutsche Werft, Hamburg	11.1944	11.1.1945	2/1945	scuttled 5.5.1945
U2363		517	Deutsche Werft, Hamburg	11.1944	18.1.1945	2/1945	surrendered 5.1945, scuttled 28.11.1945
U2364		518	Deutsche Werft, Hamburg	11.1944	23.1.1945	2/1945	scuttled 5.5.1945
U2365, 1957- Hai	S170	519	Deutsche Werft, Hamburg	12.1944	26.1.1945	3/1945	scuttled 8.5.1945, re-commissioned 8.1957, foundered 14.9.1966
U2366		520	Deutsche Werft, Hamburg	12.1944	17.2.1945	3/1945	scuttled 5.5.1945
U2367, 1957- Hecht	S171	521	Deutsche Werft, Hamburg	12.1944	23.2.1945	3/1945	collision 5.5.1945, re-commissioned 10.1957, stricken 1968
U2368		522	Deutsche Werft, Hamburg	12.1944	19.3.1945	4/1945	scuttled 5.5.1945
U2369		523	Deutsche Werft, Hamburg	12.1944	24.3.1945	4/1945	scuttled 5.5.1945
U2370		524	Deutsche Werft, Hamburg	12.1944	3/1945	---	scuttled incomplete 3.5.1945
U2371		525	Deutsche Werft, Hamburg	1.1945	18.4.1945	4/1945	scuttled 3.5.1945
U2372		1189	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2373		1190	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2374		1191	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2375		1192	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2376		1193	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2377		1194	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2378		1195	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2379		1196	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2380		1197	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2381		1198	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2382		1199	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2383		1200	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2384		1201	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2385		1202	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2386		1203	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2387		1204	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2388		1205	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2389		1206	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U2401		804	Ansaldo, Genoa	1944	---	---	cancelled 7.1944
U2402		805	Ansaldo, Genoa	1944	---	---	cancelled 7.1944
U2403		806	Ansaldo, Genoa	1944	---	---	cancelled 7.1944
U2431		656	CRDA, Monfalcone	1944	---	---	cancelled 7.1944
U2432		657	CRDA, Monfalcone	1944	---	---	cancelled 7.1944
U4701		943	Germaniawerft, Kiel	10.1944	14.12.1944	1.1945	scuttled 5.5.1945
U4702		944	Germaniawerft, Kiel	10.1944	20.12.1944	1.1945	scuttled 5.5.1945
U4703		945	Germaniawerft, Kiel	11.1944	3.1.1945	1.1945	scuttled 5.5.1945
U4704		946	Germaniawerft, Kiel	11.1944	13.2.1945	3.1945	scuttled 5.5.1945
U4705		947	Germaniawerft, Kiel	11.1944	11.1.1945	2.1945	scuttled 3.5.1945
U4706		948	Germaniawerft, Kiel	11.1944	19.1.1945	2.1945	surrendered 5.1945 to United Kingdom 5.1945, to Norway 10.1948 (Knertner)
U4707		949	Germaniawerft, Kiel	12.1944	25.1.1945	2.1945	scuttled 5.5.1945
U4708		950	Germaniawerft, Kiel	12.1944	24.3.1945	---	sunk incomplete 9.4.1945
U4709		951	Germaniawerft, Kiel	12.1944	8.2.1945	3.1945	scuttled 4.5.1945
U4710		952	Germaniawerft, Kiel	3.1945	14.4.1945	5.1945	scuttled 5.5.1945
U4711		953	Germaniawerft, Kiel	12.1944	21.2.1945	3.1945	scuttled 4.5.1945
U4712		954	Germaniawerft, Kiel	1.1945	1.3.1945	4.1945	scuttled 3.5.1945
U4713		955	Germaniawerft, Kiel	1.1945	19.4.1945	---	BU incomplete 1945
U4714		956	Germaniawerft, Kiel	1.1945	26.4.1945	---	BU incomplete 1945
U4715		957	Germaniawerft, Kiel	3.1945	---	---	BU incomplete 1945
U4716		958	Germaniawerft, Kiel	3.1945	---	---	BU incomplete 1945
U4717		959	Germaniawerft, Kiel	3.1945	---	---	BU incomplete 1945
U4718		960	Germaniawerft, Kiel	3.1945	---	---	BU incomplete 1945
U4719		961	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4720		962	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4721		963	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4722		964	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4723		965	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4724		966	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4725		967	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4726		968	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4727		969	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4728		970	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4729		971	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4730		972	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4731		973	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4732		974	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4733		975	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4734		976	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4735		977	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4736		978	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4737		979	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4738		980	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4739		981	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4740		982	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4741		983	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4742		984	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4743		985	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4744		986	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4745		987	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4746		988	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4747		989	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired
U4748		990	Germaniawerft, Kiel	---	---	---	never laid down, part of hull sections were prepaired

Technical data

Data variant	type XXIII	type 240
Displacement standard, t
Displacement normal, t	234 / 258	234 / 275
Length, m	34.7	36.1
Breadth, m	3.02	3.02
Draught, m	3.66	3.67
No of shafts	1	1
Machinery	1 MWM diesel / 1 AEG electric motor / 1 BBC crouching electric motor	1 Maybach MB820S1 diesel-generator / 1 electric motor
Power, h. p.	575 - 630 / 580 / 35	630 / 580
Max speed, kts	9.7 / 12.5	9.7 / 12.5
Fuel, t	diesel oil 20	diesel oil 18
Endurance, nm(kts)	4450(6) / 194(4)	2600(8) / 194(4)
Armament	2 - 533 TT (bow, 2)	2 - 533 TT (2)
Electronic equipment	FuMO 61 radar, GHG, Balkon-Gerät hydrohones, FuMB 3 Bali, FuMB 6 Palau ECM suites	radar, GHG, Balkon-Gerät hydrophones
Complement	14	17
Diving depth operational, m	80	80

Graphics

Project history

Last series of submarines designed and constructed before capitulation of Germany. Small submarines of XXIII series formed on the same principles that has been taken as a principle for design of large submarines of XXI series. Being similar in the dimensions with boats of II series, new submarines had almost twice higher submerged speed and in 5 times longer could be in the submerged position.

Single-hulled; cross-section of the pressure hull had the form of "8". A working diving depth was 80m, maximal 160m; minimal diving time was 9sec. Single-shaft machinery on design reminded applied on XXI series and included the electric motor for "crouching", allowing to reach 4.5kts. Boats were equipped with telescopic snorkel, but had only one periscope. Shortage of internal space, main lack of the design, did not allow to carry spare torpedoes: TTs were reloaded only outside. Despite it, submarines of XXIII series were considered very successful.

Though designing of XXIII series has begun after end of works on the design of XXI series, they were appeared embodied in metal before than latter. Building was conducted by line production method: the hull was assembled from four practically ready sections and was launched by crane. In total 378 boats were ordered, 30 of them should be built in Genoa, 15 in Monfalcone, 30 in Toulon and 15 in Nikolaev. Before capitulation of Germany 60 boats were commissioned, 5 more (U2370, U2371, U4708, U4713 and U4714) were destroyed during outfitting. Only six boats shared in operations, and no one of them was lost.

Modernizations

U2365 and U2367 were salvaged in 1956 and commissioned by West German navy as type 240 with data as given in the table

Naval service

U2323 was lost 26.7.1944 on British aviation mine in Kiel Bight, salvaged in August, 1944 and put to repair which has been not finished till the end of war. U2326 was transferred on reparations to United Kingdom as N35, in 1946 transferred to France but 6.12.1946 was lost as result of underwater accident off Toulon. U2331 was sunk 10.10.1944 at Hel Peninsula as result of accident, salvaged, towed off on repair to Kiel and scuttled there 3.5.1945 by crew. U2338 was sunk 4.5.1945 by Beaufighters of 236th and 254th RAF sqns in Little Belt. U2340 was lost 30.3.1945 during raid of US 8th Air Army bombers to Hamburg. U2342 was lost 26.12.1944 on British aviation mine N off Swinemünde. U2344 was sunk 18.2.1945 as result of collision with U2336 in Mecklenburg Bight. U2348 was transferred on reparations to United Kingdom as N21, BU in 1949.

U2353 was transferred on reparations to the USSR as M-31, BU in 1963. U2359 was sunk 2.5.1945 by Mosquitoes of 235th, 143rd and 248th RAF sqns SW off Göteborg. U2365 was scuttled by crew 8.5.1945 N off Anholt, salvaged in 1956 and entered service with Bundesmarine 15.8.1957 as Hai, she was lost 14.9.1966 as a result of technical accident. U2367 was scuttled by crew 9.5.1945 N off Swinemünde, salvaged in 1956 and commissioned by Bundesmarine as Hecht, BU in 1968.

U4706 was captured by British troops at Kristiansand in May, 1945 and in 1948 transferred to Norway as Knerten, BU in 1954.

Following submarines were scuttled by crews: U2327 and U2332 3.5.1945 at Hamburg; U2330, U4705, U4709, U4711 and U4712 3.5.1945 at Kiel; U2355 3.5.1945 in Kiel Bight; U2333, U2339, U2343, U2346, U2347, U2349, U2357, U2358, U2360, U2362, U2364, U2366, U2368, U2369, U4702, U4703, U4707 and U4710 5.5.1945 in Gelting Bay; U2352, U4701 and U4704 5.5.1945 at Hörup Haff.

U2321, U2322, U2324, U2325, U2328, U2329, U2334, U2335, U2336, U2337, U2341, U2345, U2350, U2351, U2354, U2356, U2361, U2363 surrendered and were scuttled by Allies during operation "Deadlight".

Hai was foundered in cause of technical accident in the North Sea 14.9.1966 with all hands lost, raised 24.9.1966 and broken up in 1968.