Taciturn class
Taciturn class |
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General data | ||
Ship type : | ||
Construction series: | T-class | |
Navies : |
Royal Navy (29) |
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Builders : |
Chatham Dockyard ( Chatham ) |
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Units: |
31 (2 more not completed.) |
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Technical specifications | ||
Crew : |
63 men |
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Displacement : |
surfaced: 1327 ts |
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Length : |
83.30 m |
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Width: |
8.11 m |
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Draft : |
4.80 m |
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Drive : |
Diesel engines : 2500 HP (1864 kW ) |
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Speed : |
surfaced: 15.75 kn (29 km / h ) |
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Driving range : |
popped up:
submerged:
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Fuel supply: |
up to 230 ts |
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Diving depth : |
90 m (later 110 m) |
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Armament | ||
Artillery : | ||
Air defense : | ||
Torpedoes : |
11 * 21 ″ (533-mm) tubes
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The Taciturn class was the third assembly of the British submarine-Class . The 31 submarines were built between 1941 and 1946 and were used by the Royal Navy and the Dutch Navy during and after World War II . After the war, several boats were used by the Australian and Israeli navies . The last boat in the class was decommissioned in Israel in 1975.
Building history and structural features
see also: Building history of the T-Class and structural features of the T-Class
Construction of the third batch of the T-Class began in 1941. Compared to their predecessors, the new buildings were upgraded and modernized. The submarines had increased sea endurance and, thanks to the use of part of the diving cells as an additional drift oil bunker, a significantly increased range.
In contrast to the older construction lots, the boats in the Taciturn class were equipped with radar devices as standard .
The torpedo armament has also been revised. The two middle external torpedo tubes were relocated behind the command tower and aligned aft to give the hull a more aerodynamic shape. In addition, an additional external torpedo tube was installed in the stern.
The most important modernization in production was the introduction of a fully welded pressure hull with the HMS Tiptoe, which resulted in better compressive strength of the shell and more efficient production compared to the riveting technology previously used .
However, some fundamental problems of the previous versions were not eliminated. The boats still had the flow-unfavorable bulge of the bow, the heavy bronze tower and an insufficient periscope depth.
After the war, many boats were modernized similar to the US Greater Underwater Propulsion Power Program . Based on the model of the German Type XXI boats , the battery capacity and the electrical drive power were extremely increased. The shape of the hull and the tower have been completely redesigned and made more streamlined. The pressure hull was lengthened to accommodate the enlarged batteries. All dispensable deck structures such as the deck gun and the flak were dismantled. The modifications led to an increased underwater speed. Another innovation was the use of a snorkel , which meant that the diesel engines could also be used underwater. A copy of the German folding snorkel was originally used. After a modernized A-class boat was lost due to the breakage of this snorkel type in 1951 , the telescopic snorkel developed by the US Navy was introduced.
Comparison with older lots
see also: Technical data of the T-Class assemblies in comparison
Tempest class | Taciturn class | |
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Crew: | 61 men | 63 men |
Length over all: | 83.36 m | 83.30 m |
Draft: | 3.60 m | 4.80 m |
Driving range (surfaced at 10 kn): | 8000 NM | 11000 NM |
Fuel supply: | 130 ts | 230 ts |
Diving depth: | 90 m | 90 to 110 m |
Torpedo tubes: | 10 | 11 |
Torpedoes: | 16 | 17th |
Shipyards
see also: T-Class shipyards
The submarines were built at five different shipyards in England and Scotland .
Shipyard | units |
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Chatham Dockyard ( Chatham Naval Yard ) in Chatham, England | 4th |
Devonport Dockyard ( Devonport Naval Shipyard ) in Plymouth (England) | 4th |
Portsmouth Dockyard ( Portsmouth Naval Shipyard ) in Portsmouth (England) | 2 |
Scott's Shipbuilding & Engineering Co. in Greenock (Scotland) | 1 |
Vickers-Armstrong in Barrow-in-Furness (England) | 20th |
31 |
Active units
see also: Active units of the T-Class
The first 11 units were laid down in 1941. The efforts of the British war economy showed success, so that with the HMS P311 the first submarine of the new construction lot was put into service in August 1942. Four more units were added to the Navy during the year. In the following year there were seven more inflows but also the first loss. In 1944 there were no losses, but 10 more commissionings. In the last year of the war there was one loss and seven additions. The last three units entered service in 1946. In 1950 the first units were scrapped. In the 1960s, almost all submarines in the class were scrapped. The last British unit was decommissioned in 1969. The world's last active unit of the class was the Dolphin (ex HMS Truncheon ) , which was decommissioned in Israel in 1975 .
▪ | January 1st | 1939: | 0 | ▪ | November 8th | 1942: | 3 | ▪ | January 1st | 1947: | 29 | ||
▪ | July 1 | 1939: | 0 | ▪ | January 1st | 1943: | 5 | ▪ | January 1st | 1952: | 26th | ||
▪ | September 1 | 1939: | 0 | ▪ | July 1 | 1943: | 8th | ▪ | January 1st | 1955: | 25th | ||
▪ | January 1st | 1940: | 0 | ▪ | 10th of July | 1943: | 8th | ▪ | January 1st | 1957: | 24 | ||
▪ | 9th April | 1940: | 0 | ▪ | January 1st | 1944: | 11 | ▪ | January 1st | 1961: | 22nd | ||
▪ | July 1 | 1940: | 0 | ▪ | 6th of June | 1944: | 16 | ▪ | January 1st | 1962: | 21st | ||
▪ | January 1st | 1941: | 0 | ▪ | July 1 | 1944: | 17th | ▪ | January 1st | 1963: | 18th | ||
▪ | June 22 | 1941: | 0 | ▪ | January 1st | 1945: | 21st | ▪ | January 1st | 1964: | 15th | ||
▪ | July 1 | 1941: | 0 | ▪ | 8th of May | 1945: | 24 | ▪ | January 1st | 1967: | 11 | ||
▪ | December 7th | 1941: | 0 | ▪ | July 1 | 1945: | 24 | ||||||
▪ | January 1st | 1942: | 0 | ▪ | 15th of August | 1945: | 25th | ||||||
▪ | July 1 | 1942: | 0 | ▪ | January 1st | 1946: | 27 |
Mission history
see also: History of the T-Class and Detailed History of the T-Class
The first units of the class entered the Navy in 1942. The submarines were successfully used in the North Sea , the Mediterranean and the Pacific War.
In 1943, boats of the class were involved in two Royal Navy special operations. In January, as part of Operation Principle , the HMS P311 was supposed to transport several manned Chariot torpedoes to the port of Palermo together with the older submarines HMS Trooper and HMS Thunderbolt , where the newly built Italian light cruiser Ulpio Traiano was to be mined. The HMS P311 got lost on approach. Nevertheless, the cruiser was sunk by the remaining units on January 3rd. In September dragged Truculent together with the Tempest class -Boot Thrasher and four S-class boats six midget submarines of the X class before the Norwegian Altafjord . The aim of the operation called Operation Source were the German capital ships Tirpitz and Scharnhorst . The Tirpitz was badly damaged in the attack.
From 1944 the focus of operations shifted more and more to the Asian theater of war, where the boats operated near the coast due to their shallow periscope depth and inflicted heavy losses on the Japanese supply lines with on-board artillery, sea mines and torpedo attacks.
The remaining submarines were kept in active service and modernized after the end of the war. From the mid-1950s, the boats of the class began to be taken out of service. The last British unit was the HMS Tiptoe , which was decommissioned in 1969.
Battle successes (selection)
see also: Detailed history of the T-Class
date | |
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March 2, 1943 | HMS Taurus sinks the French freighter Clairette with the deck gun off Capo Ferrato ( Sardinia ) . |
March 6, 1943 | HMS Taurus torpedoed and sunk the Spanish freighter Bartolo (3120 GRT ) off Marseille . |
March 10, 1943 | HMS Taurus torpedoes the Italian freighter Derna (1769 BRT) off Sète and sunk it with the deck gun. |
May 5, 1943 | HMS Tactician sunk 10 nautical miles west of Grosseto at 42 ° 34 ' N , 10 ° 45' O Italian auxiliary patrol boat V17 / Pia (385 BRT) with on-board artillery. |
June 4, 1943 | HMS Truculent torpedoes and sunk northeast of the Faroe Islands at 64 ° 28 ' N , 3 ° 9' W the German submarine U 308 . |
June 11, 1943 | HMS Taurus sank seven Greek sailing ships with the deck gun and another by ramming off Tilos . |
June 12, 1943 | HMS Tactician sinks the Italian sailing ship Bice (1459 GRT) with the deck gun 5 nautical miles northeast of Bari . |
June 14, 1943 | HMS Tactician torpedoed and damaged the Italian freighter Rosandra (8035 GRT) off the Albanian coast . The ship sinks the following day. |
July 13, 1943 | HMS Trespasser sinks the Italian auxiliary patrol boat V8 / Filippo (242 GRT) with the deck gun 25 nautical miles south of Bastia ( Corsica ) . |
September 23, 1943 | The German battleship Tirpitz was badly damaged by micro-submarines in the Norwegian Altafjord and was no longer operational until March 1944. |
November 10, 1943 | HMS Tally Ho torpedoes and sunk in the northern Malaya road at 6 ° 12 ' N , 99 ° 25' O Japanese transporter Kisogawa Maru (1914 BRT). |
November 13, 1943 | HMS Taurus torpedoes and sunk south of Penang ( Malaya ) at 5 ° 17 ' N , 100 ° 5' O Japanese submarine I-34 . |
January 11, 1944 | HMS Tally Ho torpedoes and sunk 10 nautical mile northwest of Penang at 5 ° 26 ' N , 99 ° 52' O Japanese light cruiser Kuma |
January 15, 1944 | HMS Tally Ho torpedoes and sunk south of Port Blair ( Andaman Islands ) at 10 ° 3 ' N , 93 ° 5' O Japanese military transport ryuko Maru (2963 BRT). |
January 27, 1944 | HMS Templar damaged in the Malay road at 4 ° 54 ' N , 98 ° 28' O Japanese light cruiser Kitakami with two torpedoes. |
February 14, 1944 | HMS Tally Ho torpedoes and sunk in the Malay road south of Penang at 4 ° 27 ' N , 100 ° 11' O the German submarine UIT 23 (ex Italian: Reginaldo Giuliani ). There are 26 dead and 14 survivors. |
February 18, 1944 | HMS Trespasser torpedoes and damaged before Burma at 7 ° 55 ' N , 93 ° 3' O Japanese auxiliary gunboat Eifuku Maru (3520 BRT) with the deck gun. |
February 21, 1944 | HMS Tally Ho torpedoes and sunk in the Malay road at 4 ° 0 ' N , 101 ° 0' O Japanese military transport Daigen Maru No. 6 (510 GRT). |
March 24, 1944 | HMS Terrapin attacks a German convoy off Egersund (Norway) and damages the catapult ship Schwabenland (8186 GRT) and the tanker Wörth (6256 GRT) with torpedoes. The Schwabenland is set on the ground. The Wörth is towed away. |
March 28, 1944 | HMS Truculent torpedoes and sunk in the Malay road at 3 ° 38 ' N , 100 ° 50' O Japanese military transport Yasushima Maru (1910 BRT). |
April 22, 1944 | HMS Taurus sunk off the coast of Malaya at 7 ° 10 ' N , 99 ° 20' O Japanese salvage ship Hokuan I-Go (558 BRT) and a tractor with the deck gun. |
May 3, 1944 | HMS Tantalus torpedoes and sunk 40 nautical miles south of Port Blair at 11 ° 0 ' N , 92 ° 0' O Japanese military transport Amagi Maru (3165 BRT). |
May 12, 1944 | The Japanese transporter Kasumi Maru (971 GRT) runs in Malakka Street at 3 ° 50 ' N , 99 ° 30' E on a sea mine laid by HMS Taurus and sinks. |
May 29, 1944 | HMS Templar torpedoed and sunk the Japanese freighter Tyokai Maru (2658 GRT) in Malakka Street . |
June 10, 1944 | HMS Tantalus sunk in the Malay road at 3 ° 5 ' N , 99 ° 56' O Japanese military transport Hiyoshi Maru (ex Dutch: Mandar , 536 BRT) with the deck gun. |
June 26, 1944 | HMS Truculent torpedoes and sunk about 60 nautical miles south-east of Medan (Sumatra) at 3 ° 15 ' N , 99 ° 46' O Japanese freighter Harugiku Maru (3040 BRT). |
July 17, 1944 | HMS Tantalus unsuccessfully attacks the Japanese submarine I-166 in Malakka Street with torpedoes. The Japanese submarine is torpedoed and sunk by HMS Telemachus on the same day . |
August 5, 1944 | HMS Terrapin bombs Japanese positions near Gunungsitoli ( Nias , Dutch East Indies). On the same day, a coaster sunk and another damaged. |
August 18, 1944 | Zwaardvisch sunk in the Malay road at 4 ° 0 ' N , 99 ° 32' O the sailing ship Kim Hup Soen (48 BRT) with on-board artillery. |
September 5, 1944 | HMS tantivy torpedoes and sunk in the Semangka-bay at 5 ° 44 ' S , 104 ° 58' O Japanese freighter Shiretoko Maru (ex Dutch: Siberoet 1799 BRT). |
September 18, 1944 | HMS Trade wind torpedoes and sunk 18 nautical miles south of Mukomuko (Sumatra) in 2 ° 52 ' S , 101 ° 12' O Japanese military transport Junyo Maru (5065 BRT). The Japanese ship of hell transports 4,200 Indonesian forced laborers and 2,300 Allied prisoners of war. 5,620 people are killed. |
September 19, 1944 | HMS Trenchant rams two Siamese sailing ships east of Sumatra and sinks them. |
September 23, 1944 | HMS Trenchant torpedoes and sunk in the Malay Street Northwest of Penang at 5 ° 46 ' N , 100 ° 4' O the German submarine U 859 . |
October 6, 1944 | Zwaardvisch torpedoes and sunk in the Java Sea at 6 ° 20 ' S , 111 ° 28' O the German submarine U 168 . |
October 6, 1944 | HMS Tally Ho sunk approximately 110 nautical miles south west of Penang at 4 ° 20 ' N , 98 ° 24' O Japanese auxiliary U-Hunter Cha 2 (130 ts). |
October 10, 1944 | Zwaardvisch the Indonesian island sunk southwest Bawean at 5 ° 57 ' S , 112 ° 29' O Japanese patrol boat Koei Maru (19 BRT) with the deck gun. |
October 15, 1944 | Zwaardvisch sunk before Surabaya at '6 ° 30 S , 111 ° 35' O Japanese research vessel Kaiyo Maru No. 2 (143 BRT) with the deck gun. |
October 17, 1944 | Zwaardvisch torpediert before Bawean at 5 ° 26 ' S , 113 ° 48' O Japanese Minelayer Itsukushima (1970 ts) and Wakataka (1608 ts). Itsukushima is sunk and Wakataka is damaged. |
October 22, 1944 | HMS Tantivy sunk off Makassar ( Sulawesi , Dutch East Indies) at 5 ° 47 ′ S , 119 ° 42 ′ E the Japanese Aviso No. 137 (approx. 200 GRT) with the deck gun. On the same day, six more unidentified smaller units are sunk. |
October 27, 1944 | HMS Trenchant transports small Chariot submarines to the port of Phuket , which sink the Japanese military transport Sumatra Maru (984 GRT, ex Dutch: Tomori ). |
November 2, 1944 | HMS Tantalus accesses 225 nautical miles east of Singapore at 0 ° 48 ' N , 107 ° 43' O Japanese freighter Hachijin Maru (1918 BRT) and Japanese U-Hunter Ch 1 (266 ts) with torpedoes. The freighter is sunk, the U-fighter damaged. |
November 2, 1944 | HMS Terrapin sunk in the Malay road at 1 ° 30 ' N , 103 ° 0' O Japanese auxiliary vessel Kumano Maru (872 BRT). |
November 4, 1944 | HMS Terrapin torpedoes and sunk in the Malay road at 3 ° 44 ' N , 99 ° 50' O Japanese minesweeper W-5 . |
November 11, 1944 | HMS Tantalus sinks the Japanese coaster Palang Maru (approx. 200 GRT) with the deck gun off the east coast of Malaysia . |
November 20, 1944 | HMS Tally Ho sunk 30 nautical miles east of the southern tip of Great Nicobar ( Nikobaren ) at 6 ° 55 ' N , 94 ° 15' O Japanese auxiliary Minelayer Ma 4 (215 ts). |
December 21, 1944 | HMS Trenchant sinks two Japanese landing craft with the deck gun off the east coast of Sumatra . |
December 22, 1944 | HMS Terrapin sunk together with HMS Trenchant at 1 ° 4 ' S , 104 ° 34' O Japanese tanker Yaei Maru No. 6 (834 GRT) with artillery on board. |
December 25, 1944 | Together with HMS Trenchant, HMS Terrapin sinks the Japanese rescue minesweeper Reisui Maru (219 GRT). The two submarines also report the sinking of a fishing vessel and three coasters. |
December 29, 1944 | Between December 17th and 29th, HMS Thule sank 13 junks , two lighters and five sampans with the deck gun in Malakka Street . |
January 1, 1945 | The Japanese freighter Kyokko Maru (593 BRT) runs at the Mergui Islands at 12 ° 26 ' N , 98 ° 39' O on of HMS Trade wind Laid sea mines and sinks. |
January 23, 1945 | The Japanese freighter Nikkaku Maru (1946 BRT) and the tanker hozan Maru I go (868 BRT) run in the Malay road at 4 ° 8 ' N , 98 ° 15' O on of HMS Trenchant on September 16, 1944 Laid sea mines and sink. |
January 30, 1945 | HMS Tantalus sunk in Bangka Street (between Bangka and Sumatra, Dutch East Indies) at 1 ° 26 ′ S , 105 ° 1 ′ E the Japanese fishing vessel Taisei Maru No. 12 (120 BRT) with the deck gun. |
March 4, 1945 | HMS Terrapin and HMS Trenchant sink together in the Malay Straße 85 nautical miles south of Penang at 4 ° 4 ' N , 100 ° 35' O Japanese U-Hunter Ch 8 with on-board artillery. |
April 2, 1945 | HMS Thorough sinks a Japanese gunboat with artillery in front of the Nicobar Islands. |
April 12, 1945 | HMS Tapir torpedoes and sunk northwest of Bergen (Norway) at 60 ° 44 ' N , 4 ° 39' O the German submarine U 486 . |
April 29, 1945 | HMS Trade wind torpedoes and sunk in the Gulf of Thailand at 6 ° 48 ' N , 101 ° 36' O Japanese freighter Takasago Maru (1116 BRT). |
May 13, 1945 | HMS Trump sunk in the Sapudi road at 7 ° 5 ' S , 114 ° 13' O the Japanese Coast protection vessel Shosei Maru No. 15 (43 BRT) with the deck gun. |
May 25, 1945 | HMS Trenchant sunk east of the Indonesian island Mandalike at 6 ° 23 ' S , 110 ° 55' O Japanese auxiliary minesweeper Wa 105 (175 ts, ex Dutch: Grissee ). |
June 1, 1945 | HMS tiptoe torpedoes and sunk in the Java Sea off the Indonesian island Matasiri at 4 ° 40 ' S , 115 ° 32' O Japanese freighter Tobi Maru (982 BRT). |
June 8, 1945 | HMS Trenchant torpedoes and sunk in the northern entrance of the Bangka Road at 9 ° 59 ' S , 104 ° 56' O Japanese heavy cruiser Ashigara (13,000 ts) |
June 15, 1945 | HMS Taciturn sinks a Japanese Hulk (the upscale Dutch submarine K XVIII ) and the Japanese auxiliary submarine Cha 105 (130 ts) with the deck gun north of Surabaya . |
August 3, 1945 | HMS tiptoe torpedoes and sunk before the Sunda Strait at 5 ° 7 ' S , 106 ° 5' O Japanese salvage ship Tencho Maru (2608 BRT). |
August 9, 1945 | HMS Tiptoe and HMS Trump jointly sink a Japanese tanker with artillery in the northern Sunda Strait. |
Losses in World War II
see also: T-Class losses
Two units were lost to enemy action during World War II. One submarine sank in the Mediterranean, another was badly damaged in Asia and no longer repaired.
boat | date | comment |
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HMS P311 | January 8, 1943 | HMS P311 left Malta on December 28, 1942. It was carrying a Chariot - a micro-submarine intended to attack Italian cruisers as part of Operation Principle . The P311 sent its last position report on December 31 at 38 ° 10 ' N , 11 ° 30' E. There have been no further reports since then. Presumably the submarine ran into a sea mine on January 2, 1943 near La Maddalena . The HMS P311 was declared missing on January 8, 1943. There were no survivors. |
HMS Terrapin | May 19, 1945 | HMS Terrapin attacked a Japanese tanker west of Batavia on May 9, 1945 , whereupon it was attacked by an escort vehicle with depth charges. The badly hit submarine escaped and ran to Fremantle in Australia , where it was written off as a total constructive loss and scrapped after the end of the war. The Terrapin was the last loss of a British submarine in World War II. |
Use in other navies
A total of ten Taciturn-class submarines were lent or sold to allied states.
Dutch Navy
HMS talent | Mr. Ms. Zwaardvis | On March 23, 1943 to the Netherlands, renamed Zwaardvis in 1950 , decommissioned on December 11, 1962, scrapped in 1963. |
HMS camouflage | Mr. Ms. Tijgerhaai | On March 28, 1945 to the Netherlands, decommissioned on December 11, 1964 and sold for scrapping in 1965. |
HMS Taurus | Mr. Ms. Dolfijn | On June 4, 1948 to the Netherlands, on December 7, 1953 back to the Royal Navy, scrapped in 1960. |
HMS tapir | Mr. Ms. Zeehond | On June 18, 1948 to the Netherlands, on July 16, 1953 back to the Royal Navy, scrapped in 1966. |
Israeli Navy
HMS totem | Dakar (דקר) | Sold to Israel in 1965, sunk with the entire crew on January 25, 1968 during the crossing to Israel. |
HMS Truncheon | Dolphin | Sold to Israel in 1965, entered service with the Israeli Navy in 1967, decommissioned in 1975 and scrapped in 1977. |
HMS Turpin | Leviathan (לויתן) | Sold to Israel in 1965, entered service with the Israeli Navy in 1967, sunk in 1973 as a target for exercise. |
Australian Navy
HMS Trump | Trump | 1961 to Australia, 1968 back to Great Britain, scrapped in 1971. |
HMS tabard | Tabard | 1962 to Australia, 1968 back to Great Britain, scrapped in 1974. |
HMS Taciturn | Taciturn | Overhauled in Australia in 1964, then served in the Australian Navy, scrapped in 1971. |
units
Between 1941 and 1946, 31 submarines of the third batch of the T-class were built and put into service in five shipyards. Two units were not completed after the end of the war, although they had already been launched. The construction of at least four more submarines was planned. Only two submarines of the assembly were lost during World War II. The last British boat was the HMS Tiptoe , which was decommissioned in 1969 . The last active T-class submarine was the Israeli Dolphin , which was decommissioned in 1975 .
HMS P311 | |||
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Builder: | Vickers-Armstrong (Barrow-in-Furness) | No: | P311 |
Keel laying: | April 25, 1941 | Launch: | March 5, 1942 |
Commissioning: | August 7, 1942 | End of duty: | January 8, 1943 |
The P311 was used in the Mediterranean. She has been missing since January 8, 1943. |
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HMS Trespasser | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P312 (ex P92) |
Keel laying: | September 8, 1941 | Launch: | May 29, 1942 |
Commissioning: | September 25, 1942 | End of duty: | |
The Trespasser (English intruder ) was used in the Mediterranean and East Asia. The Trespasser remained in active service in the Royal Navy after the war. The submarine was sold for scrapping on September 26, 1961 and scrapped in Gateshead, England. |
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HMS Thule | |||
Builder: | Devonport Dockyard (Plymouth) | No.: | P325 |
Keel laying: | September 20, 1941 | Launch: | October 22, 1942 |
Commissioning: | May 13, 1944 | End of duty: | |
The Thule was used in the North Sea and in East Asia. The Thule remained in active service with the Royal Navy after the war. The Thule was damaged in a collision in the English Channel on November 18, 1960 . It was scrapped in Inverkeithing, Scotland , in September 1962 . |
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HMS Tudor | |||
Builder: | Devonport Dockyard (Plymouth) | No.: | P326 |
Keel laying: | September 20, 1941 | Launch: | September 23, 1942 |
Commissioning: | January 16, 1944 | End of duty: | |
The Tudor (see House Tudor ) was used in East Asia. The Tudor remained in active service in the Royal Navy after the war. It was sold for scrapping on July 1, 1963 and broken up in Faslane, Scotland. |
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HMS Taurus Dolfijn |
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Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P339 (ex P93, P313) |
Keel laying: | September 30, 1941 | Launch: | June 27, 1942 |
Commissioning: | November 3, 1942 | End of duty: | |
The Taurus was used in the Mediterranean and East Asia. The Taurus was awarded on June 4, 1948 to the Dutch Navy , which put the submarine under the name Dolfijn ( ndl . : Delfin ) in service. The Dutch returned the submarine to the United Kingdom on December 7, 1953. On December 8, 1953, the submarine was returned to service with the Royal Navy under its original name. The Taurus was scrapped in Dunston (England) in April 1960 . |
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HMS Tireless | |||
Builder: | Portsmouth Dockyard (Portsmouth) | No.: | P327 |
Keel laying: | October 30, 1941 | Launch: | March 19, 1943 |
Commissioning: | April 18, 1945 | End of duty: | |
The Tireless (English: tireless ) was no longer used in war. It was modernized in the 1950s and the hull was optimized for high underwater speed. The HMS Tireless was scrapped in Newport (England) in November 1968. |
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HMS token | |||
Builder: | Portsmouth Dockyard (Portsmouth) | No.: | P328 |
Keel laying: | November 6, 1941 | Launch: | March 19, 1943 |
Commissioning: | December 15, 1945 | End of duty: | |
The token (ger .: characters ) was no longer used in the war. It was modernized in the 1950s and the hull was optimized for high underwater speed. The HMS token was sold as scrap in March 1970 and demolished in Cairn Ryan (Scotland). |
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HMS Tactician | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P314 |
Keel laying: | November 13, 1941 | Launch: | July 29, 1942 |
Commissioning: | November 29, 1942 | End of duty: | |
The Tactician (English: Tactician ) was used in the Mediterranean and East Asia. The Tactician remained in active service in the Royal Navy after the war. It was sold for scrapping in 1963 and broken up in Newport, England. |
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HMS Truculent | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P315 (ex P95) |
Keel laying: | December 4, 1941 | Launch: | September 12, 1942 |
Commissioning: | December 31, 1942 | End of duty: | January 12, 1950 |
The Truculent (English: wild , defiant ) was used in the North Sea and in East Asia. On June 4, 1943, she sank the German submarine U 308 northeast of the Faroe Islands . The Truculent sank on January 12, 1950 after a collision with a merchant ship in the Thames estuary . 15 sailors were killed in the accident. The wreck was lifted on March 14, 1950 and sold as scrap on May 12, 1950. |
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HMS Templar | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P316 (ex P96) |
Keel laying: | December 28, 1941 | Launch: | October 26, 1942 |
Commissioning: | February 15, 1943 | End of duty: | |
The Templar (English: Knights Templar ) was used in East Asia. The submarine was sunk in 1954 in Loch Striven (Scotland) as a training target. The wreck was lifted on December 4, 1958 and scrapped in Troon, Scotland, in July 1959 . |
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HMS Tradewind | |||
Builder: | Chatham Dockyard (Chatham) | No.: | P329 |
Keel laying: | February 11, 1941 | Launch: | December 11, 1942 |
Commissioning: | October 18, 1943 | End of duty: | |
The Tradewind (English: Passat ) was used in East Asia. The submarine was sold as scrap on December 14, 1955 and scrapped in Charlestown, England. |
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HMS Tally-Ho | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P317 (ex P97) |
Keel laying: | March 25, 1942 | Launch: | December 23, 1942 |
Commissioning: | April 12, 1943 | End of duty: | |
The Tally-Ho (English: Halali ) was used in East Asia. The Tally-Ho remained in active service with the Royal Navy after the war. The submarine was sold for scrapping on February 10, 1967 and demolished in Briton Ferry, Wales. |
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HMS Trenchant | |||
Builder: | Chatham Dockyard (Chatham) | No.: | P331 |
Keel laying: | May 9, 1942 | Launch: | March 24, 1943 |
Commissioning: | February 26, 1944 | End of duty: | |
The Trenchant (English: energetic ) was used in East Asia. The Trenchant remained in active service in the Royal Navy after the war. The submarine was sold for scrapping on July 1, 1963 and demolished in Faslane, Scotland. |
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HMS Tantalus | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P318 |
Keel laying: | June 6, 1942 | Launch: | February 24, 1943 |
Commissioning: | June 2, 1943 | End of duty: | |
The Tantalus (see: Tantalus ) was used in East Asia. The submarine was scrapped in Milford Haven, Wales in November 1950 . |
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HMS Tantivy | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P319 (ex P99) |
Keel laying: | 4th July 1942 | Launch: | April 6, 1943 |
Commissioning: | July 25, 1943 | End of duty: | |
The Tantivy was used in East Asia. The submarine was sunk in 1951 in the Cromarty Firth (Scotland) as a training target. |
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HMS Telemachus | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P321 |
Keel laying: | August 25, 1942 | Launch: | June 19, 1943 |
Commissioning: | October 25, 1943 | End of duty: | |
The Telemachus (see Telemachos ) was used in East Asia. The submarine remained in service with the Royal Navy after the war and was scrapped in Charlestown in August 1961. |
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HMS Talent (I) Zwaardvisch |
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Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P322 |
Keel laying: | October 13, 1942 | Launch: | July 17, 1943 |
Commissioning: | November 23, 1943 | End of duty: | December 11, 1962 |
The Talent (see Talent ) was never in the service of the Royal Navy. She was sold to the Netherlands on March 23, 1943 and put into service by the Dutch Navy on November 23, 1943 under the name Zwaardvisch (see swordfish ). The Dutch used the submarine in East Asia. In 1950 the submarine was renamed Zwaardvis . The Zwaardvis was decommissioned on December 11, 1962 and sold for scrapping on July 12, 1963 in Amsterdam . |
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HMS Terrapin | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P323 |
Keel laying: | October 19, 1942 | Launch: | August 31, 1943 |
Commissioning: | January 22, 1944 | End of duty: | 1945 |
The Terrapin (English: box turtle ) was used in the North Sea and in East Asia. The submarine was badly damaged on May 19, 1945 west of Batavia by Japanese submarine fighters, but managed to escape. The submarine was so badly damaged that it could no longer be made ready for sea and was abandoned as a total constructive loss. This was the Royal Navy's last submarine loss in World War II. The HMS Terrapin was scrapped in June 1946. |
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HMS Totem Dakar (דקר) |
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Builder: | Devonport Dockyard (Plymouth) | No.: | P352 |
Keel laying: | October 22, 1942 | Launch: | September 28, 1943 |
Commissioning: | January 9, 1945 | End of duty: | January 26, 1968 |
The totem (see: Totem ) was modernized in 1950/51. The submarine was sold to Israel in 1965 . The Israeli Navy put the boat into service on November 10, 1967 under the name Dakar (דקר; Iwrit : swordfish ). The submarine sank on January 26, 1968 with the entire crew under previously unexplained circumstances during the crossing from Great Britain to Israel in the eastern Mediterranean. The wreck was discovered between Crete and Cyprus in 1999 . |
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HMS Thorough | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P324 |
Keel laying: | October 26, 1942 | Launch: | October 30, 1943 |
Commissioning: | March 1, 1944 | End of duty: | |
The Thorough (English: immutable ) was used in East Asia. The submarine remained in service with the Royal Navy after the war and was scrapped in Dunston (England) in June 1962. |
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HMS Truncheon Dolphin |
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Builder: | Devonport Dockyard (Plymouth) | No.: | P353 |
Keel laying: | November 5, 1942 | Launch: | February 22, 1944 |
Commissioning: | May 25, 1945 | End of duty: | August 1975 |
The Truncheon (English: baton ) was modernized in 1950/51. The submarine was sold to Israel in 1965. The Israeli navy turned the boat in 1967 under the name Dolphin ( Dolphin ) into service. The submarine was decommissioned in August 1975 and scrapped in 1977. At the time of its decommissioning, the Dolphin was the last active T-class unit in the world. |
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HMS Tiptoe | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P332 |
Keel laying: | November 10, 1942 | Launch: | February 25, 1944 |
Commissioning: | June 12, 1944 | End of duty: | 29th August 1969 |
The Tiptoe (ger .: toe ) was used in East Asia. The submarine was modernized in 1950/51. The Royal Navy used the submarine in 1962 for deep rescue attempts in Malta, with 7 men successfully performing an emergency ascent from a depth of 79 m . The Tiptoe was decommissioned in August 1969 and scrapped in Portsmouth in 1979. The Tiptoe was the last active British T-class boat. |
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HMS Trump | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P333 |
Keel laying: | December 31, 1942 | Launch: | March 25, 1944 |
Commissioning: | July 8, 1944 | End of duty: | |
The Trump (English: trump or trumpet ) was used in East Asia. The submarine was modernized in 1956. The HMS Trump was used by the Royal Australian Navy between 1961 and 1969 . The submarine was scrapped in Newport in 1971. |
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HMS Taciturn | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P334 |
Keel laying: | March 9, 1943 | Launch: | June 7, 1944 |
Commissioning: | October 8, 1944 | End of duty: | |
The Taciturn (English: silent or taciturn ) was used in East Asia. The submarine was modernized in 1950/51. The Taciturn was overhauled in Australia in the early 1960s and then used by the Australian Navy for several years. The HMS Taciturn was scrapped in Briton Ferry (Wales) in 1971. |
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HMS Tapir Zeehond |
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Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P335 |
Keel laying: | March 29, 1943 | Launch: | August 21, 1944 |
Commissioning: | December 30, 1944 | End of duty: | |
The Tapir (see: Tapir ) was used in the North Sea and sank the German submarine U 486 on April 12, 1945 . After the war, the submarine was modernized. The Royal Netherlands Navy used the Tapir between 1948 and 1953 under the name Zeehond ( Dutch : seal ). The submarine was scrapped in Faslane (Scotland) in December 1966. |
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HMS Thor | |||
Builder: | Portsmouth Dockyard (Portsmouth) | No.: | P349 |
Keel laying: | April 5, 1943 | Launch: | April 18, 1944 |
The HMS Thor (see: Thor ) was no longer completed. The half-finished submarine was scrapped in July 1946. |
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HMS tiara | |||
Builder: | Portsmouth Dockyard (Portsmouth) | No.: | P351 |
Keel laying: | April 8, 1943 | Launch: | April 18, 1944 |
The HMS Tiara (see: Tiara ) was no longer completed. The half-finished submarine was scrapped in Dover (England) in June 1947 . |
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HMS Turpin Leviathan (לויתן) |
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Builder: | Chatham Dockyard (Chatham) | No.: | P354 |
Keel laying: | May 24, 1943 | Launch: | August 5, 1944 |
Commissioning: | December 18, 1944 | End of duty: | |
The Turpin was modernized in 1950/51. The submarine was sold to Israel in 1965 and entered service in 1967 under the name Leviathan (see: Leviathan ). The Leviathan was sunk in December 1973 as a target for torpedo trials. |
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HMS Tarn Tijgerhaai |
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Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P336 |
Keel laying: | June 12, 1943 | Launch: | November 29, 1944 |
Commissioning: | April 7, 1945 | End of duty: | December 11, 1964 |
The Tarn (English: mountain lake ) was handed over to the Dutch Navy before it was commissioned. The Dutch put the submarine called Tijgerhaai ( Dutch : tiger shark ) into service. The Tijgerhaai was no longer active in combat. The submarine was modernized in 1961/62. The Tijgerhaai was decommissioned on December 11, 1964 and sold for scrapping on November 5, 1965. |
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HMS Thermopylae | |||
Builder: | Chatham Dockyard (Chatham) | No.: | P355 |
Keel laying: | October 26, 1943 | Launch: | June 27, 1945 |
Commissioning: | December 5, 1945 | End of duty: | |
The Thermopylae (see: Thermopylae ) was modernized in 1950/51. The submarine sank during a training exercise in Loch Striven, was then lifted and scrapped in Troon (Scotland) in 1970. |
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HMS Talent (III) ex HMS Tasman |
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Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P337 |
Keel laying: | March 21, 1944 | Launch: | February 13, 1945 |
Commissioning: | July 27, 1945 | End of duty: | December 1966 |
The Talent was originally launched with the name HMS Tasman (see: Tasman ), but was renamed HMS Talent in April 1945 . The submarine was overhauled and modernized in Malta in 1960/61. The Talent was decommissioned in 1966 and scrapped in Troon, Scotland in 1970. |
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HMS Teredo | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P338 |
Keel laying: | April 17, 1944 | Launch: | April 27, 1945 |
Commissioning: | April 13, 1946 | End of duty: | |
The Teredo (English: shipworm ) was later modernized and scrapped in Briton Ferry (Wales) in 1965. |
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HMS tabard | |||
Builder: | Scott's Shipbuilding & Engineering Co. (Greenock) | No.: | P342 |
Keel laying: | September 6, 1944 | Launch: | November 21, 1945 |
Commissioning: | June 25, 1946 | End of duty: | |
The tabard (English: Tappert ) was modernized in 1950/51. The submarine was used by the Australian Navy between 1962 and 1968. The Tabard was used as a training boat for several years after 1968 and was scrapped in 1974. |
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HMS Threat | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P344 |
The construction contract for the thread (English: threat ) was canceled in 1944. |
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HMS Theban | |||
Builder: | Vickers-Armstrong (Barrow-in-Furness) | No.: | P341 |
The construction contract for the Theban (see: Thebes ) was canceled in 1944. |
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HMS Talent (II) | |||
Builder: |
Vickers-Armstrong (Barrow-in-Furness) Scott's Shipbuilding & Engineering Co. (Greenock) |
No.: | P343 |
The original plan was to build the Talent at Vickers . Scott's later received the building contract, which was canceled in 1944. Because the HMS Talent was not built, the HMS Tasman was renamed HMS Talent in April 1945 . |
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HMS Typhoon | |||
The construction contract for the planned Typhoon (ger .: Typhoon ) was not granted. |
literature
- Erminio Bagnasco: Submarines in World War II. Motorbuchverlag, Stuttgart 1996, ISBN 3-613-01252-9 .
- Robert Hutchinson: FIGHT UNDER WATER - Submarines from 1776 to the present day. Motorbuchverlag, Stuttgart 2006, ISBN 3-613-02585-X .
- Anthony Preston: The History of the Submarines. Karl Müller Verlag, Erlangen 1998, ISBN 3-86070-697-7 .
- Peter Padfield: The Submarine War 1939-1945. Ullstein Taschenbuchverlag, Munich 2000, ISBN 3-548-24766-0 .
Web links
- T-Class on uboat.net (English)
- British Submarines of Wold War Two (English)
- Israeli T-class submarines (English)
- Dutch T-class submarines (English)
Individual evidence
- ↑ a b The uboat.net gives 59 men for the crew strength of the 1st assembly group and 61 men for the 2nd and 3rd assembly group. Robert Hutchinson gives 62 men for the 1st assembly group, 61 men for the 2nd assembly group and 63 men for the 3rd assembly group. Erminio Bagnasco gives 56 men for the 1st and 2nd assembly and 63 men for the 3rd assembly.
- ↑ The uboat.net specifies 1090 GRT for the above water displacement of all assemblies . In addition, uboat.net specifies HMS Triton 1095 BRT for the prototype . Hutchinson gives 1325 ts for the 1st assembly and 1327 ts for the other two groups. Bagnasco specifies 1330 ts for the HMS Triton , 1326 to 1327 ts for assemblies 1 and 2 and 1321 to 1422 ts for the third assembly.
- ↑ The uboat.net gives 1575 GRT for the underwater displacement of all assemblies. In addition, the uboat.net specifies HMS Triton 1579 BRT for the prototype . Hutchinson gives 1573 ts for the 1st assembly and 1571 ts for the other two groups. Bagnasco specifies 1585 ts for the HMS Triton , 1523 to 1575 ts for assemblies 1 and 2 and 1571 ts for the third assembly.
- ↑ a b The uboat.net specifies 275 ft (83.82 m) for the length of all assemblies . Hutchinson gives 83.97 m for the 1st assembly, 83.36 m for the 2nd assembly and 83.30 m for the 3rd assembly. Bagnasco gives 84.20 m for the prototype HMS Triton, 83.60 m for the 1st and 2nd group and 83.10 m for the 3rd assembly group.
- ↑ The uboat.net makes no statement about the width. Hutchinson gives 8.11 m for all assemblies. Bagnasco gives practically the same value for all submarines with 8.10 m.
- ↑ a b The uboat.net and Hutchinson make no statement about the draft. Bagnasco gives 3.60 m for the first two construction groups and 4.80 m for the third construction lot.
- ↑ The uboat.net and Bagnasco give an overwater speed of 15.25 kn for all assemblies. Hutchinson gives 15.25 knots for the 1st assembly and 15.75 knots for the two later assemblies.
- ↑ The uboat.net and Bagnasco indicate an underwater speed of 9 kn for all assemblies. Hutchinson gives 8.75 kn for all assemblies.
- ↑ a b The uboat.net gives no information about the above water range. Hutchinson gives 8,000 nautical miles for the first and second assembly and 11,000 nautical miles for the third. He also mentions that the submarines of the first assembly HMS Torbay and HMS Trident also had a range of 11,000 nautical miles. Bagnasco gives 8000 nautical miles for the first and second assembly. For the third assembly, he gives 8000 to 11,000 nautical miles.
- ↑ The uboat.net and Bagnasco make no statement about the underwater range. Hutchinson gives 80 nautical miles for all assemblies.
- ↑ a b The uboat.net and Hutchinson do not give any information about the fuel supply. Bagnasco, who only differentiates between two assemblies and the prototype HMS Triton , writes that many boats of the second assembly were rebuilt and their fuel oil bunkers were enlarged from 132 to 230 ts. Hutchinson's 2nd assembly corresponds to the 3rd assembly described here.
- ↑ a b The uboat.net and Bagnasco make no statement about the diving depth. Hutchinson gives 90 m for all classes. In addition, he specifies a guaranteed diving depth of 110 m for the fully welded boats of the 3rd assembly from HMS Tiptoe .
- ↑ Anthony Preston: The History of the Submarines. P. 66.
- ↑ a b c The uboat.net and Bagnasco state that the shipyard of HMS Turpin (3rd subassembly) is the Chatham shipyard . Hutchinson states that the shipyard is Portsmouth . According to Hutchinsons, the number of units built at Chatham Naval Yard would decrease to three and the number of units built at Portsmouth Naval Yard would increase to three.
- ↑ The sources are contradicting the sinking of the Ulpio Traiano . Robert Hutchinson, www.wlb-stuttgart.de , regiamarina.net ( Memento from May 16, 2008 in the Internet Archive ) and www.schiffswrackliste.de give the 2./3. January 1943. www.marinearchiv.de gives the 2nd / 3rd June 1943, which is unlikely since the HMS Thunderbolt was lost in March.
- ↑ a b Information about Operation Source ( Memento from September 28, 2007 in the Internet Archive ) at www.schlachtschiff.com.
- ↑ I-34 on www.combinedfleet.com (Engl.)
- ↑ Kuma on www.combinedfleet.com (Engl.)
- ↑ Kitakami on www.combinedfleet.com (Engl.)
- ↑ UIT 23 in uboat.net (engl.)
- ↑ I-166 on www.combinedfleet.com (Engl.)
- ↑ Sinking of the Junyo Maru ( Memento of May 27, 2017 in the Internet Archive ) (English)
- ↑ Itsukushima on www.combinedfleet.com (Engl.)
- ↑ W-5 on www.combinedfleet.com (Engl.)
- ↑ Ashigara on www.combinedfleet.com (Engl.)
- ↑ a b See article about the Zwaardvisch at www.dutchsubmarines.com
- ↑ a b See article about the Tijgerhaai at www.dutchsubmarines.com
- ↑ a b See article about the Dolfijn at www.dutchsubmarines.com
- ↑ a b See article about the Zeehond at www.dutchsubmarines.com
- ↑ a b See article about the Dakar at www.submarines.dotan.net
- ↑ a b The uboat.net states that the Leviathan was scrapped in 1978. Hutchinson states that the Israeli submarine was sunk in 1973 during torpedo tests as a training target.
- ↑ a b The uboat.net states that the HMS Trump was used by the Australian Navy between 1961 and 1968. Hutchinson does not mention the use in Australia.
- ↑ a b The uboat.net does not mention the use in Australia. Hutchinson states that the tabard was used by the Australian Navy between 1962 and 1968.
- ↑ a b The uboat.net and Hutchinson do not mention the use in Australia. The information comes from the National Archives of Australia .
- ↑ Hutchinson and Bagnasco do not provide any information on the launching of the T-class submarines. The information on launch runs comes from uboat.net .
- ↑ The sources for the end of duty and scrapping of the HMS Tactician (P314) are contradictory. Hutchinson states that the submarine was sold on December 6, 1962 and scrapped in Newport. Bagnasco does not give any details. uboat.net states that the submarine was scrapped in Newport on December 6, 1963. British submarines during World War II ( Memento of 8 June 2011 at the Internet Archive ) returns as the date for the " disposal " ( disposal ) on December 1, 1963rd
- ↑ Hutchinson gives the year 1950 for the sinking of the HMS Templar . The uboat.net states 1954.
- ↑ a b c d e f g The uboat.net is an additional shipyard, the John Brown Shipbuilding & Engineering Company Ltd. in Clydebank, Scotland. Bagnasco and Hutchinson do not mention the shipyard.
- ↑ The uboat.net specifies the HMS Trenchant P331 as the shell number . Hutchinson specifies P318 ex P98 . Hutchinson's statement appears to be incorrect as he gives the same numbers for HMS Tantalus .
- ↑ The uboat.net specifies the HMS Tantalus P318 as the shell number . Hutchinson specifies P318 ex P98 . Hutchinson's statement is contradictory as he gives the same numbers for HMS Trenchant .
- ↑ a b The uboat.net specifies Bellis & Morcom in Ladywood ( Birmingham , England) as an additional shipyard . Bagnasco and Hutchinson do not mention the shipyard.
- ↑ The uboat.net states January 22, 1944 for the commissioning of the HMS Terrapin . Hutchinson gives January 21, 1944.
- ↑ The uboat.net specifies June 12, 1944 for the commissioning of the HMS Tiptoe . Hutchinson gives April 12, 1944.
- ↑ The uboat.net states that the HMS Tiptoe was scrapped in 1979. Hutchinson states 1975.
- ↑ The uboat.net states December 31, 1942 for the laying of the keel of the HMS Trump . Hutchinson gives December 13, 1942.
- ↑ The uboat.net gives the year 1956 for the modernization of the HMS Trump . Hutchinson states 1950/51.
- ↑ The uboat.net states March 28, 1945 for the commissioning of the Tijgerhaai . Hutchinson states that the submarine was handed over to the Netherlands on March 28, 1945 and put into service on April 7, 1945.
- ↑ The uboat.net states October 26, 1943 for the laying of the Thermopylae keel . Hutchinson gives October 16, 1943.
- ↑ The uboat.net does not mention that the Thermopylae has sunk. Hutchinson mentions the accident but does not give a date.
- ↑ The uboat.net states April 13, 1946 for the commissioning of the Teredo . Hutchinson gives January 21, 1946.
- ↑ The uboat.net states that the Tabard was put into service on June 25, 1946. Hutchinson states June 25, 1945.
- ↑ The uboat.net states that the construction contract for the HMS Thread in 1945 was canceled. Hutchinson states 1944.
- ↑ The uboat.net states that the construction contract for the HMS Theban was canceled in 1945. Hutchinson states 1944.
- ↑ The uboat.net states that the construction contract for the HMS Talent was canceled in 1945. Hutchinson states 1944.
Remarks
- ↑ The overview only shows the relationship between departures due to accidents or enemy action and additions due to new buildings. Shipyard stays for overhaul or modernization are not considered. As a result, the number of real operational submarines was lower. In addition, most of the post-war units only know the date of scrapping.