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ROYAL NAVY - UNITED KINGDOM

SUBMARINES

"U" War Emergency and 1940 Programs and 1941 Program "short hull" submarines (UTMOST) (1940 - 1943)

Utmost 1941

Name No Builder Laid down Launched Comp Fate
War Emergency program
Umpire N82 Chatham DYd 1/1940 30/12/1940 7/1941 collision 19/7/1941
Una N87 Chatham DYd 5/1940 10/6/1941 9/1941 BU 4/1949
Unbeaten N93 Vickers-Armstrong, Barrow 11/1939 9/7/1940 11/1940 sunk 11/11/1942
Undaunted P34 - N55 Vickers-Armstrong, Barrow 8/1940 20/8/1940 12/1940 sunk 13/5/1941
Union N56 Vickers-Armstrong, Barrow 12/1939 1/10/1940 2/1941 sunk 20/7/1941
Unique P36 - N95 Vickers-Armstrong, Barrow 10/1939 6/6/1940 9/1940 sunk 23/10/1942
Upholder P37 - N99 Vickers-Armstrong, Barrow 10/1939 8/7/1940 10/1940 sunk 14/4/1942
Upright P38 - N89 Vickers-Armstrong, Barrow 11/1939 21/4/1940 9/1940 BU 12/1945
Urchin, 7/1945 - P97 P59 - N97 Vickers-Armstrong, Barrow 12/1939 30/9/1940 ---// 1/1941 to Poland at completion 1/1941 - 7/1945 (Sokół), BU 1949
Urge P40 - N17 Vickers-Armstrong, Barrow 10/1939 19/8/1940 12/1940 sunk 28/4/1942
Usk P41 - N65 Vickers-Armstrong, Barrow 11/1939 7/6/1940 10/1940 sunk 28/4/1941
Utmost P42 - N19 Vickers-Armstrong, Barrow 11/1939 20/4/1940 8/1940 sunk 24/11/1942
1940 and 1941 programs
P31, 1/1943 - Uproar (ex-Ullswater) P31 Vickers-Armstrong, Barrow 4/1940 27/11/1940 4/1941 BU 2/1946
P32 P32 Vickers-Armstrong, Barrow 4/1940 15/12/1940 5/1941 sunk 18/8/1941
P33 P33 Vickers-Armstrong, Barrow 6/1940 28/1/1941 5/1941 sunk 23/8/1941
P34, 1/1943 - Ultimatum P34 Vickers-Armstrong, Barrow 6/1940 11/2/1941 7/1941 BU 12/1949
P35, 1/1943 - Umbra P35 Vickers-Armstrong, Barrow 7/1940 15/3/1941 9/1941 BU 7/1946
P36 P36 Vickers-Armstrong, Barrow 7/1940 28/4/1941 9/1941 sunk 1/4/1942
P37, 1/1943 - Unbending P37 Vickers-Armstrong, Barrow 8/1940 12/5/1941 11/1941 BU 12/1949
P38 P38 Vickers-Armstrong, Barrow 9/1940 9/7/1941 10/1941 sunk 23/2/1942
P39 P39 Vickers-Armstrong, Barrow 101940 23/8/1941 11/1941 sunk 26/3/1942
P41 P41 Vickers-Armstrong, Barrow 1940 24/8/1941 ---// 12/1941 to Norway at completion 12/1941 (Uredd)
P42, 1/1943 - Unbroken P42 Vickers-Armstrong, Barrow 12/1940 4/11/1941 1/1942 to Soviet Union 5/1944 - 2/1949 (-2) (V-2), BU 5/1950
P43, 1/1943 - Unison P43 Vickers-Armstrong, Barrow 12/1940 5/11/1941 2/1942 to Soviet Union 5/1944 - 2/1949 (-3) (V-3), BU 5/1950
P44, 1/1943 - United P44 Vickers-Armstrong, Barrow 2/1941 18/12/1941 4/1942 BU 2/1946
P45, 1/1943 - Unrivalled P45 Vickers-Armstrong, Barrow 5/1941 16/2/1942 5/1942 BU 1/1946
P46, 1/1943 - Unruffled P46 Vickers-Armstrong, Barrow 2/1941 19/12/1941 4/1942 BU 1/1946
P47 P47 Vickers-Armstrong, Barrow 1941 27/7/1942 ---// 10/1942 to Netherlands before completion 9/1942 (Dolfijn)
P48 P48 Vickers-Armstrong, Barrow 8/1941 15/4/1942 6/1942 sunk 25/12/1942
P49, 1/1943 - Unruly P49 Vickers-Armstrong, Barrow 11/1941 28/7/1942 11/1942 BU 2/1946
P51, 1/1943 - Unseen P51 Vickers-Armstrong, Barrow 7/1941 16/4/1942 7/1942 BU 9/1949
P52 P52 Vickers-Armstrong, Barrow 1941 11/10/1942 ---// 12/1942 to Poland at completion 12/1942 - 12/1946 (Dzik), to Denmark 6/1947 (Springeren)
P53, 1/1943 - Ultor P53 Vickers-Armstrong, Barrow 12/1941 12/10/1942 12/1942 BU 1/1946
P54, 1/1943 - Unshaken P54 Vickers-Armstrong, Barrow 6/1941 17/2/1942 5/1942 BU 3/1946
P55, 1/1943 - Unsparing P55 Vickers-Armstrong, Tyne 8/1941 28/7/1942 11/1942 BU 2/1946
Usurper (ex-P56) P56 Vickers-Armstrong, Tyne 9/1941 24/9/1942 2/1943 sunk 3/10/1943
Universal (ex-P57) P57 Vickers-Armstrong, Tyne 9/1941 10/11/1942 3/1943 BU 2/1946
Untamed, 7/1943 - Vitality (ex-P58) P58 Vickers-Armstrong, Tyne 10/1941 8/12/1942 4/1943 BU 2/1946
Unswerving P63 Vickers-Armstrong, Tyne 2/1942 19/7/1943 10/1943 BU 7/1949
Untiring (ex-Upstart, ex-P59) P59 Vickers-Armstrong, Tyne 12/1941 20/1/1943 6/1943 to Greece 7/1945 - 5/1952 (Xifias), sunk as target 25/7/1957
Vandal (ex-P64) P64 Vickers-Armstrong, Barrow 3/1942 23/11/1942 2/1943 sunk 24/2/1943
Upstart (ex-Untiring, ex-P65) P65 Vickers-Armstrong, Barrow 3/1942 24/11/1942 4/1943 to Greece 3/1945 - 5/1952 (Amfitriti), sunk as target 29/7/1957
Uther P62 Vickers-Armstrong, Tyne 1/1942 6/4/1943 8/1943 BU 2/1950
Varangian P61 Vickers-Armstrong, Tyne 12/1941 4/3/1943 7/1943 BU 6/1949
Varne P81 Vickers-Armstrong, Barrow 11/1942 22/1/1943 ---// 4/1943 to Norway at completion 4/1943 (Ula)
Vox, 7/1946 - P67 P73 Vickers-Armstrong, Barrow 12/1942 23/1/1943 ---// 5/1943 to France at completion 5/1943 - 7/1946 (Curie), BU 5/1949

 

Displacement standard, t

540

Displacement normal, t

630 / 732 (later 646/732)

Length, m

60.0

Unbeaten, Unique, Upholder, Upright, Usk, Utmost: 58.2

Undaunted, Union, Urchin, Urge: 58.6

Breadth, m

4.90

Draught, m

4.52 - 4.65

No of shafts

2

Machinery

2 Paxman-Ricardo or Paxman diesel-generators/ 2 electric motors

Power, h. p.

615 / 825

Max speed, kn

11.25 / 10

Fuel, t

diesel oil 38, later 55

Endurance, nm(kts)

4050(10) /

Armament

submarines completed in 1940 - 1942: 4 - 533 TT (bow, 8), 1 x 1 - 76/40 12pdr 12cwt QF Mk I/II/V

Unique, Upholder, Upright, Utmost: 6 - 533 TT (4 bow, 2 ext bow, 8), 1 x 1 - 76/40 12pdr 12cwt QF Mk I/II/V

submarines completed in 1942 - 1943: 4 - 533 TT (bow, 8 torpedoes or 6 M2 mines), 1 1 - 76/45 20cwt QF Mk II

Sensors

submarines completed in 1941 - 1942: type 286PW radar, sonars

submarines completed in 1942 - 1943: type 291W radar, sonars

Complement

31 - 33

Diving depth operational, m 60

Ship project history: These submarines were originally reflected as unarmed targets for training of crews of escort ships. Already after design approval it was decided to arm them with TT. Construction of a fore end was changed for placing 4 TT in pressure hull and two more out of it, in a special fin. Single-hulled. Feature of this class that there on shafts only electric motors were and diesels used only in a role of generators. There were first British pure diesel-electric submarines.

New boats received a designation as "U" class, have appeared very successful, and better than boats of other types approached for actions in Mediterranean and Northern seas, however originally a series have limited to three units of the 1936 program. Only after beginning of war in limits of "War Emergency program" orders were placed for 12 more units. Four of them have built with six TT, remaining lost outer TTs, since during operation of the first boats of a series it was discovered, that a bow TT fin creates on periscopic depth very large breaker (as well as on type "").

Under 1940 and 1941 programs 41 more submarines were ordered from which 7 were canceled.

Fuel stowage was later increased to 55t for the account of use of part of ballast tanks.

Modernizations: 1942 - 1944, all survived early submarines: can carry 6 M2 mines instead of torpedoes, - 1 x 1 - 76/40; + 1 x 1 - 76/45 20cwt QF Mk II

1/1946, Una, P97, Uproar, Ultimatum, Umbra, Unbending, Unbroken, Unison, United, Unrivalled, Unruffled, Unruly, Unseen, P52, Ultor, Unshaken, Unsparing, Universal, Vitality, Unswerving, Untiring, Upstart, Uther, Varangian, P67: 1 x 1 - 76/45 CP Mk V, 4 - 533 TT

Naval service: Usk was lost 28/4/1941 in Mediterranean sea (presumably on a mine). Undaunted was lost 13/5/1941 on a mine at Tripoli. Umpire was lost 19/7/1941 at collision with a trawler Peter Hendriks in the North Sea. Union was sunk by DCs of Italian torpedo boat Circe 20/7/1941 in Mediterranean sea. 32 was lost 18/8/1941 on a mine at Tripoli. 33 was lost for unknown reason (possibly 23/8/1941 on a mine at Tripoli). 38 was sunk by DCs of Italian torpedo boat Circe 23/2/1942 in Mediterranean sea. 39 was sunk by German aircraft on Malta 26/3/1942. 36 was sunk 1/4/1942 by German aircraft in Mediterranean sea. Upholder was sunk by DCs of Italian torpedo boat Pegaso 14/4/1942 in Mediterranean sea. Urge was sunk by Italian aircraft 28/4/1942 in Mediterranean sea. Unique was lost 23/10/1942 at Gibraltar for unknown reason. Unbeaten was sunk by mistake by British aircraft in bay of Biscay 11/11/1942. Utmost was sunk 24/11/1942 by DCs of Italian torpedo boat Groppo in Mediterranean sea. 48 was sunk by DCs of Italian corvette Ardente 25/12/1942 in Mediterranean sea. Vandal was lost for the unknown reason 24/2/1943 at British coast. Uredd was lost 24/2/1943 on a mine in the North Sea. Untamed was sunk 30/5/1943 during trials at British coast, salvaged 5/7/1943 and commissioned as Vitality. Usurper was sunk by DCs of German trawler UJ2208 in Mediterranean sea 3/10/1943. Untiring and Upstart were scuttled after returning from Greece and used as targets for underwater location.

Varangian 1946

Ivan Gogin, 2008-15