U Class
Ultimatum

Umbra

 

Unbending Unbroken Unison Unity Unrivalled Unruffed

 

 

Group 1

Boats in class  15 Units - Undine  Unity  Ursula  Umpire  Una  Unbeaten  Undaunted  Union  Unique  Upholder  Upright  Urchin  Urge  Usk  Utmost
Normal displacement surfaced  630t
Normal displacement submerged  730t
Machinery  2 x Admiralty or Davey Paxman Diesel
2 x General Electric
Maximum power Surfaced/Submerged  615hp/825hp
Speed Surfaced/Submerged  11,5 knots/9 knots
Armament  1 x 76mm L/50 Gun
3 x 303 MG
Torpedeo Tubes  4 or 6 x 533mm/8 or 10 Torpedoes
Length  58,1m
Beam  4,8m
Height  4,8m
Complement  33
Year of construction  1937-1941
Fate  
Builder  Undine  Unity  Ursula - Vickers Armstrong Barrow 1937-1938
Umpire  Una - Chatham Dockyard 1939-1941
Unbeaten  Undaunted  Union  Unique  Upholder  Upright  Urchin  Urge  Usk  Utmost - Vickers Armstrong Barrow 1939-1941

Group 2

Boats in class  34 Units - Uproar  Ultimatum  Umbra  Unbending  Unbroken  Unison  United  Unrivalled  Unruffed  Unruly  Unseen  Ultor  Unshaken  Unsparing  Usuper  Universal  Vitality  Untiring  Varangian  Uther  Unswerving  Vandal  Upstart  Varne  Vox
Normal displacement surfaced  648t
Normal displacement submerged  735t
Machinery  2 x Admiralty or Davey Paxman Diesel
2 x General Electric
Maximum power Surfaced/Submerged  615hp/825hp
Speed Surfaced/Submerged  11,5 knots/9 knots
Armament  1 x 76mm L/50 Gun
3 x 303 MG
Torpedeo Tubes  4 or 6 x 533mm/8 or 10 Torpedoes
Length  59,6m
Beam  4,8m
Height  4,9m
Complement  33
Year of construction  1941-1944
Fate  
Builder Uproar  Ultimatum  Umbra  Unbending  Unbroken  Unison - Vickers Armstrong Barrow 1940-1942
United  Unrivalled  Unruffed  Unruly  Unseen  Ultor  Unshaken - Vickers Armstrong Barrow 1941-1943
Unsparing  Usuper  Universal  Vitality  Untiring  Varangian  Uther  Unswerving - Vickers Armstrong Tyne 1941-1944
Vandal  Upstart  Varne  Vox - Vickers Armstrong Barrow 1941-1943