| Built By: | Vickers (Barrow) |
| Build Group: | R |
| Fate: | Broken Up February 1923 |
| Length overall | 163 ft 9 inch |
| Beam | 15 ft 9 inch |
| Depth | 15 ft 3 inch |
| Displacement | 410 tons (surface) |
| 503 tons (submerged) | |
| Diving Depth | 150 ft |
| Speed | Surface 15 knots (design) |
| Surface 15 knots (service) | |
| Submerged 9.5 knots (design) | |
| Submerged 9.5 knots (service) | |
| Endurance | Surface: 2000 miles at 9 knots (design) |
| Surface: 2400 miles at full power (service) | |
| Submerged: 15 miles at full power (design) | |
| Submerged: 15 miles at full power or 150 miles at 1.5 knots (service) | |
| No. of shafts | 1 |
| Armament | 6 x 18 inch bow tubes (7 torpedoes carried) |
| Complement | 2 officers, 20 ratings. |
The British submarine, M1 which uniquely carried the firepower of a battleship was discovered 35 miles south-east of Plymouth at a depth of 81 metres by diver and submarine expert, Innes McCartney and boat skipper Grahame Knott.
Of all the acts of gallantry in World War II few were as audacious as the attack by midget submarines on the pride of the German fleet, the battleship Tirpitz, lying in her fortified mooring in a Norwegian fjord.
Lieutenant Godfrey Place was in command of submarine X7 in September 1943 and travelled over 1000 miles, negotiating minefields and antisubmarine nets to accurately place four tons of high explosive under the hull of the Tirpitz.
14 pages added or updated in the last 1 month
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| Length overall | 163 ft 9 inch |
| Beam | 15 ft 9 inch |
| Depth | 15 ft 3 inch |
| Displacement | 410 tons (surface) |
| 503 tons (submerged) | |
| Diving Depth | 150 ft |
| Speed | Surface 15 knots (design) |
| Surface 15 knots (service) | |
| Submerged 9.5 knots (design) | |
| Submerged 9.5 knots (service) | |
| Endurance | Surface: 2000 miles at 9 knots (design) |
| Surface: 2400 miles at full power (service) | |
| Submerged: 15 miles at full power (design) | |
| Submerged: 15 miles at full power or 150 miles at 1.5 knots (service) | |
| No. of shafts | 1 |
| Armament | 6 x 18 inch bow tubes (7 torpedoes carried) |
| Complement | 2 officers, 20 ratings. |
The British submarine, M1 which uniquely carried the firepower of a battleship was discovered 35 miles south-east of Plymouth at a depth of 81 metres by diver and submarine expert, Innes McCartney and boat skipper Grahame Knott.
Of all the acts of gallantry in World War II few were as audacious as the attack by midget submarines on the pride of the German fleet, the battleship Tirpitz, lying in her fortified mooring in a Norwegian fjord.
Lieutenant Godfrey Place was in command of submarine X7 in September 1943 and travelled over 1000 miles, negotiating minefields and antisubmarine nets to accurately place four tons of high explosive under the hull of the Tirpitz.
14 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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