Just want to inform that all of my articles relating to Orange Twilight: the Netherlands during the Twilight War and beyond are now located at my own forum (
Link)
Diesel attack submarines of the Royal Navy of 1997
Upholder-class submarine
The Royal Navy was going to follow the Oberons with nuclear-powered boats but there was still a role for diesel powered boats, as demonstrated by activities during the Falklands War, and they could be built faster than nuclear submarines. The only yard building nuclear submarines was Vickers at Barrow-in-Furness and it was occupied with the Vanguard class ballistic missile submarines. Accordingly to provide the Royal Navy with a diesel boat for the Greenland-Iceland-UK Gap, Vickers Shipbuilding and Engineering Ltd developed the Upholder class from the 1970s onwards.
The design was based on their private scheme for a 2400 tonne submarine for export sales. This was combined with lessons learnt from the Oberons and the design of the Trafalgar-class fleet submarines. They were built with teardrop hulls and the fin was built from glass fibre to keep weight down. The Upholder-class is equipped with technology generally found only on nuclear-powered submarines and when the first of her class (Upholder) entered into service in 1992 they class was widely regarded as being among the best diesel-electric submarines in the world. The first of the class (Upholder) was ordered in November 1983 and completed in 1990, and there followed seven more boats (Unseen, Ursula, Unicorn, Undaunted, Upright, Undine and Unity) ordered in 1986 and completed in period of 1991 to 1996. The Royal Navy had planned to order 12 of the class, but this was trimmed first to 10 and then to 8.
Ships in class
HMS Upholder (S40)
HMS Unseen (S41)
HMS Ursula (S42)
HMS Unicorn (S43)
HMS Undaunted (S44)
HMS Upright (S45)
HMS Undine (S46)
HMS Unity (S47)
Nuclear-powered attack submarines of the Royal Navy of 1997
Swiftsure-class submarine
The Swiftsure class is a class of nuclear-powered fleet submarines in service with the Royal Navy from the early 1970s. Six boats were built and commissioned but HMS Swiftsure the first of her class was decommissioned in 1992 due to damage suffered to her pressure hull during trials.
Ships in class
HMS Sovereign (S108)
HMS Superb (S109)
HMS Sceptre (S104)
HMS Spartan (S105)
HMS Splendid (S106)
Trafalgar-class submarine
The Trafalgar-class is a type of nuclear-powered fleet submarine in service with the Royal Navy, the successor to the Swiftsure class. Like the majority of Royal Navy nuclear submarines, all nine vessels were constructed by Vickers Shipbuilding and Engineering in Barrow-in-Furness, Cumbria and commissioned in the 1983 to 1993 period.
Ships in class
HMS Trafalgar (S107)
HMS Turbulent (S87)
HMS Tireless (S88)
HMS Torbay (S90)
HMS Trenchant (S91)
HMS Talent (S92)
HMS Triumph (S93)
HMS Triton (S94)
HMS Traveller (S95)