| Built By: | Vickers (Barrow) |
| Build Group: | C1 |
| Fate: | She was scrapped in February 1922. |
1914: 3rd Flotilla, Devonport, HMS Forth
| Length overall | 143 ft |
| Beam | 13 ft |
| Displacement | Surface 290 tons |
| Draught | 11.5 ft |
| Submerged 320 tons | |
| Diving Depth | 100 ft |
| Speed | Surface 13 knots (design) |
| Surface 13+ knots (service) | |
| Submerged 7.5+ knots (design) | |
| Submerged 8 knots (service) | |
| Machinery | 600 hp petrol engine |
| 200 hp electric motor | |
| No. of shafts | 1 |
| Propeller | 3 blades, 5 ft 7 inch diameter |
| Armament | 2 x 18 inch bow torpedo tubes (4 torpedoes carried) |
| Endurance | Surface: 1300 miles at 9 knots (design) |
| Fuel | 15.5 tons (Petrol) |
| Surface: 910 miles at full power (service) | |
| Submerged: 16 miles at 8 knots | |
| Complement | 2 x officers, 14 x ratings |
Tetrarch (N 77) |
|
| Class: | 1935 - 1970: T Class |
| Built By: | |
| Build Group: | T 1 |
|
Fate: After leaving Alexandria on 17th October 1941 en-route home to the UK via Malta and Gibraltar, the Commanding Officer, Lieutenant Commander Greenway, was requested to carry out a short patrol off Cavioli Island after leaving Malta and before proceeding to Gibraltar. Her last recorded position was established with Submarine HMS P34 as being 37 Degrees 28 Minutes North, 12 Degrees 35 Minutes East in the Sicilian Channel on 27th October 1941. No more was heard from the submarine she was presumed to have been lost in a minefield either in the Sicilian Channel or off the Island of Cavioli on 27th October 1941. |
|
On the outbreak of war in 1939 Admiral Donitzs U-boat flotillas consisted of some thirty U-boats fully operational, with only six to eight at sea at any one time. Their activities were restricted mainly to the North Sea and British coastal waters.
When France fell in the summer of 1940, the ports in the Bay of Biscay gave direct access to the Atlantic, and the ability to extend their reach even to. The Royal Navy was unable to escort convoys much beyond the Western Approaches. In a short time, the Allies were losing 500,000 tons of shipping a month, every month.
Donitz now looked over the far horizons, Americas Eastern Seaboard, the coasts of Africa, and the Mediterranean, where Allied merchantmen habitually sailed alone and unprotected. There was a rich harvest to be gathered in by the long range U-boats, the silent hunter-killers, mostly operating alone.
This book tells their story.
13 pages added or updated in the last 2 month
Please help to maintain this site by reporting any Errors, Broken Links, Information or Site Issues on this page using this button
If you find this site useful, please consider supporting my work with a small Donation.
Please Note: Donations made using this option go directly to the site owner and not to the Submariners Association.
Thankyou for your support.
| Length overall | 143 ft |
| Beam | 13 ft |
| Displacement | Surface 290 tons |
| Draught | 11.5 ft |
| Submerged 320 tons | |
| Diving Depth | 100 ft |
| Speed | Surface 13 knots (design) |
| Surface 13+ knots (service) | |
| Submerged 7.5+ knots (design) | |
| Submerged 8 knots (service) | |
| Machinery | 600 hp petrol engine |
| 200 hp electric motor | |
| No. of shafts | 1 |
| Propeller | 3 blades, 5 ft 7 inch diameter |
| Armament | 2 x 18 inch bow torpedo tubes (4 torpedoes carried) |
| Endurance | Surface: 1300 miles at 9 knots (design) |
| Fuel | 15.5 tons (Petrol) |
| Surface: 910 miles at full power (service) | |
| Submerged: 16 miles at 8 knots | |
| Complement | 2 x officers, 14 x ratings |
Tetrarch (N 77) |
|
| Class: | 1935 - 1970: T Class |
| Built By: | |
| Build Group: | T 1 |
|
Fate: After leaving Alexandria on 17th October 1941 en-route home to the UK via Malta and Gibraltar, the Commanding Officer, Lieutenant Commander Greenway, was requested to carry out a short patrol off Cavioli Island after leaving Malta and before proceeding to Gibraltar. Her last recorded position was established with Submarine HMS P34 as being 37 Degrees 28 Minutes North, 12 Degrees 35 Minutes East in the Sicilian Channel on 27th October 1941. No more was heard from the submarine she was presumed to have been lost in a minefield either in the Sicilian Channel or off the Island of Cavioli on 27th October 1941. |
|
On the outbreak of war in 1939 Admiral Donitzs U-boat flotillas consisted of some thirty U-boats fully operational, with only six to eight at sea at any one time. Their activities were restricted mainly to the North Sea and British coastal waters.
When France fell in the summer of 1940, the ports in the Bay of Biscay gave direct access to the Atlantic, and the ability to extend their reach even to. The Royal Navy was unable to escort convoys much beyond the Western Approaches. In a short time, the Allies were losing 500,000 tons of shipping a month, every month.
Donitz now looked over the far horizons, Americas Eastern Seaboard, the coasts of Africa, and the Mediterranean, where Allied merchantmen habitually sailed alone and unprotected. There was a rich harvest to be gathered in by the long range U-boats, the silent hunter-killers, mostly operating alone.
This book tells their story.
13 pages added or updated in the last 2 month
Please help to maintain this site by reporting any Errors, Broken Links, Information or Site Issues on this page using this button
If you find this site useful, please consider supporting my work with a small Donation.
Please Note: Donations made using this option go directly to the site owner and not to the Submariners Association.
Thankyou for your support.

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