| Built By: | Vickers (Barrow) |
| Build Group: | C2 |
| Fate: | Scrapped in China in 1919 |
1914: Attached to China Squadron
| Length overall | 143 ft |
| Beam | 13 ft |
| Draught | 11.5 ft |
| Displacement | Surface 290 tons |
| Submerged 321 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 | |
| Fuel | 15.5 tons (Petrol) |
| 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) |
| Surface: 910 miles at full power (service) | |
| Submerged: 16 miles at 8 knots | |
| Complement | 2 x officers, 14 x ratings |
In 1950 FOS/M received approval to commence work on streamlining older riveted boats early in 1951. The first boat, HMS Tireless was taken in hand in at the end of 1951 and apparently completed in 1952 ready for trials. Followed by the Token, Tapir, Talent and Teredo.
During the bleak, heartbreaking days of early 1942, when beleaguered Malta was reeling under bombardment and blockade and Rommel was making his last desperate thrust towards Egypt, only one British submarine was operating in the western Mediterranean - the tiny, 600-ton Unbroken.
In twelve months in the Med, Unbroken sank over 30,000 tons of enemy shipping, took part in four secret operations, three successful gun actions, and survived a total of over 400 depth charges, as well as innumerable air and surface attacks.
This account of the 26-year-old Alastair Mars' command of this outstandingly successful submarine embraces her construction, sea trials and voyage to Gibraltar preparatory to her vital role in the Mediterranean. Once there, she was responsible for the destruction of two Italian cruisers and played a pivotal part in Operation Pedestal, the convoy that saved Malta from surrender.
Alastair Mars writes simply and without pretension, and his words evoke the claustrophobic yet heroic world of the submariner.
22 pages added or updated in the last 1 month
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| Length overall | 143 ft |
| Beam | 13 ft |
| Draught | 11.5 ft |
| Displacement | Surface 290 tons |
| Submerged 321 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 | |
| Fuel | 15.5 tons (Petrol) |
| 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) |
| Surface: 910 miles at full power (service) | |
| Submerged: 16 miles at 8 knots | |
| Complement | 2 x officers, 14 x ratings |
In 1950 FOS/M received approval to commence work on streamlining older riveted boats early in 1951. The first boat, HMS Tireless was taken in hand in at the end of 1951 and apparently completed in 1952 ready for trials. Followed by the Token, Tapir, Talent and Teredo.
During the bleak, heartbreaking days of early 1942, when beleaguered Malta was reeling under bombardment and blockade and Rommel was making his last desperate thrust towards Egypt, only one British submarine was operating in the western Mediterranean - the tiny, 600-ton Unbroken.
In twelve months in the Med, Unbroken sank over 30,000 tons of enemy shipping, took part in four secret operations, three successful gun actions, and survived a total of over 400 depth charges, as well as innumerable air and surface attacks.
This account of the 26-year-old Alastair Mars' command of this outstandingly successful submarine embraces her construction, sea trials and voyage to Gibraltar preparatory to her vital role in the Mediterranean. Once there, she was responsible for the destruction of two Italian cruisers and played a pivotal part in Operation Pedestal, the convoy that saved Malta from surrender.
Alastair Mars writes simply and without pretension, and his words evoke the claustrophobic yet heroic world of the submariner.
22 pages added or updated in the last 1 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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