NAVYPEDIA

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Alderney 1950  

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Abelard	P451		Portsmouth DYd	1945	---	---	cancelled
Acasta	P452		Portsmouth DYd	1945	---	---	cancelled
Ace	P414		Devonport DYd	12.1943	14.3.1945	---	completed as target
Achates	P433		Devonport DYd	3/1944	20.9.1945	---	completed as target
Acheron	P411, 1948- S61		Chatham DYd	8/1944	25.3.1947	4/1948	BU 2.1972
Adept	P412		Chatham DYd	1945	---	---	cancelled
Admirable	P434		Vickers-Armstrong, Tyne	1945	---	---	cancelled
Adversary	P457		Vickers-Armstrong, Tyne	1945	---	---	cancelled
Aeneas	P427, 1948- S72		Cammell Laird, Birkenhead	10/1944	25.10.1945	7/1946	BU 12.1974
Affray	P421, 1948- S20		Cammell Laird, Birkenhead	1.1944	12.4.1945	5.1946	lost 17.4.1951
Agate	P448		Cammell Laird, Birkenhead	1945	---	---	cancelled
Aggressor	P446		Cammell Laird, Birkenhead	1945	---	---	cancelled
Agile	P443		Cammell Laird, Birkenhead	1945	---	---	cancelled
Aladdin	P454		Cammell Laird, Birkenhead	1945	---	---	cancelled
Alaric	P441, 1948- S41		Cammell Laird, Birkenhead	5/1944	18.2.1946	12/1946	BU 7.1971
Alcestis	P453		Cammell Laird, Birkenhead	1945	---	---	cancelled
Alcide	P415, 1948- S65		Vickers-Armstrong, Barrow	2/1945	12.4.1945	10/1946	BU 6.1974
Alderney	P416, 1948- S66		Vickers-Armstrong, Barrow	2/1945	25.6.1945	12/1946	BU 8.1972
Alliance	P417, 1948- S67		Vickers-Armstrong, Barrow	3/1945	28.7.1945	5/1947	preserved 1.1981
Ambush	P418, 1948- S68		Vickers-Armstrong, Barrow	5/1945	24.9.1945	7/1947	BU 7.1971
Amphion (ex-Anchorite)	P439, 1948- S43		Vickers-Armstrong, Barrow	11/1943	31.8.1944	3/1945	BU 7.1971
Anchorite (ex-Amphion)	P422, 1948- S64		Vickers-Armstrong, Barrow	7/1945	22.1.1946	11/1947	BU 8.1970
Andrew	P423, 1948- S63		Vickers-Armstrong, Barrow	8/1945	6.4.1946	3/1948	BU 5.1977
Andromache	P424		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Answer	P425		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Antaeus	P429		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Antagonist	P428		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Anzac	P431		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Aphrodite	P432		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Approach	P435		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Arcadian	P436		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Ardent	P437		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Argosy	P438		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Artemis	P449, 1948- S49		Scotts, Greenock	2/1944	26.8.1946	8/1947	BU 1.1972
Artful	P456, 1948- S96		Scotts, Greenock	6/1944	22.5.1947	2/1948	BU 6.1972
Asgard	P458		Scotts, Greenock	1945	---	---	cancelled
Asperity	P444		Vickers-Armstrong, Tyne	1945	---	---	cancelled
Assurance	P462		Scotts, Greenock	1945	---	---	cancelled
Astarte	P461		Scotts, Greenock	1945	---	---	cancelled
Astute	P447, 1948- S47		Vickers-Armstrong, Barrow	4/1944	30.1.1945	6/1945	BU 10.1970
Atlantis	P442		Vickers-Armstrong, Barrow	1945	---	---	cancelled
Auriga	P419, 1948- S69		Vickers-Armstrong, Barrow	6/1944	29.3.1945	1/1946	BU 2.1975
Aurochs	P426, 1948- S26		Vickers-Armstrong, Barrow	6.1944	28.7.1945	2/1947	BU 2.1967
Austere	P445		Vickers-Armstrong, Tyne	1945	---	---	cancelled
Awake	P459		Vickers-Armstrong, Tyne	1945	---	---	cancelled
Aztec	P455		Vickers-Armstrong, Tyne	1945	---	---	cancelled

Technical data

Max speed, kts, kn	18.5 / 8 Abelard, Acasta, Ace, Achates: 17.5 / 8	19 / 15
Displacement standard, t	1120	1120
Displacement normal, t	1385 / 1620	1443 / 1620
Length, m	85.1	67.4 pp 85.9 oa
Breadth, m	6.78	6.80
Draught, m	5.21	5.50
No of shafts	2	2
Machinery	4 8-cyl Vickers supercharged diesels / 2 electric motors Acheron, Aeneas, Affray, Alaric, Artemis, Artful: 4 8-cyl Admiralty supercharged diesels / 2 electric motors Abelard, Acasta, Ace, Achates: 4 6-cyl Admiralty supercharged diesels / 2 electric motors	4 Vickers-Admiralty supercharged diesels / 2 electric motors
Power, h. p.	4300 / 1250 Abelard, Acasta, Ace, Achates: 3400 / 1250	4300 / 1250
Fuel, t	diesel oil 165, 219 maximally	diesel oil 213
Endurance, nm(kts)	10500(11) / 90(3)
Armament	Alliance, Amphion, Astute: 1 x 1 - 102/40 QF Mk XXII, 1 x 1 - 20/70 Oerlikon Mk IV, 10 - 533 TT (4 bow, 2 stern, 2 ext bow, 2 ext stern, 20 torpedoes or 18 М2 mines) others: 1 x 1 - 102/40 S Mk I, 1 x 1 - 20/70 Mk VII S/M, 10 - 533 TT (4 bow, 2 stern, 2 ext bow, 2 ext stern, 20 torpedoes or 18 М2 mines)	6 - 533 TT (4 fwd, 2 aft, 18 torpedoes or 18 Мk 2 or 26 Mk 5 mines)
Electronic equipment	type 267W radar, type 138, type 152 sonars	type 267W radar, type 186, type 187, type 197 sonars
Complement	61	63
Diving depth operational, m	105	105

Standard scale images

Graphics

Project history

These submarines were designed in 1943 specially for service in Pacific and had better surface speed and improved habitability. Unlike all previous patrol submarines, they were double-hulled instead of traditional saddle-tank form. Many technical decisions introduced on "Т" class during serial building, in particular, an all-welded pressure hull were used. Operational diving depth was 105 m, maximal 180 m. Welded fuel tanks placed inside and out of a pressure hull. The additional fuel stowage could be hold in the welded ballast tanks specially adapted for this purpose. In comparison with "Т" class, TTs were distributed between a bow and a stern more equally: 6 and 4, a partly out of a pressure hull.

Building of 46 "A" class boats was provided under 1943 Programme. Order for 28 units had been canceled.

Modernizations

late 1940s, all: - 1 x 1 - 102/40, 1 x 1 - 20/70, 2 - 533 TT (ext fwd)

late 1940s, several: + 1 x 1 - 102/33 S Mk II (QF Mk XXIII gun)

1955 - 1960, Acheron, Aeneas, Alaric, Alcide, Alderney, Alliance, Ambush, Amphion, Anchorite, Andrew, Artemis, Artful, Astute, Auriga: were modernized as follows: