| Built By: | Vickers (Barrow) |
| Build Group: | Amphion |
| Fate: | Cancelled |
| Length overall | 280 ft 6in |
| Beam | 22 ft |
| Depth | 16ft |
| Displacement | 1385 tons (surface) |
| 1620 tons (submerged) | |
| Diving Depth | 350 ft |
| Speed | Surface 18.5 knots (design) |
| Submarged 8 knots (design) | |
| No. of shafts | 2 |
| Armament | 6 x 21 inch bow tubes (2 external) |
| 4 x 21 inch stern tubes (2 external) | |
| 20 torpedoes carried | |
| 1 x 4 inch gun | |
| 1 x 20mm Qerlikon cannon | |
| 3 x 0.303in machine-guns | |
| Endurance | Surface: 10 500 miles at 11 knots (design) |
| Submerged: 16 miles at 8 knots or 90 miles at 3 knots | |
| Complement | 6 Officers and 55 Ratings. |
| 6 Officers and 58 Ratings after modernisation. |
H 4 |
|
| Class: | 1917 - 1945: H Class |
| Built By: | |
| Build Group: | H1 |
|
Fate: Foundered in the English channel Sept 3 1918 while under tow to be scrapped. She was salvaged and used as a target the following year. |
|
Until recently Fort Blockhouse or HMS DOLPHIN provided a spiritual and physical home for the Royal Navy's Submarine Service. This short article details the Forts long history
18 pages added or updated in the last 3 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 | 280 ft 6in |
| Beam | 22 ft |
| Depth | 16ft |
| Displacement | 1385 tons (surface) |
| 1620 tons (submerged) | |
| Diving Depth | 350 ft |
| Speed | Surface 18.5 knots (design) |
| Submarged 8 knots (design) | |
| No. of shafts | 2 |
| Armament | 6 x 21 inch bow tubes (2 external) |
| 4 x 21 inch stern tubes (2 external) | |
| 20 torpedoes carried | |
| 1 x 4 inch gun | |
| 1 x 20mm Qerlikon cannon | |
| 3 x 0.303in machine-guns | |
| Endurance | Surface: 10 500 miles at 11 knots (design) |
| Submerged: 16 miles at 8 knots or 90 miles at 3 knots | |
| Complement | 6 Officers and 55 Ratings. |
| 6 Officers and 58 Ratings after modernisation. |
H 4 |
|
| Class: | 1917 - 1945: H Class |
| Built By: | |
| Build Group: | H1 |
|
Fate: Foundered in the English channel Sept 3 1918 while under tow to be scrapped. She was salvaged and used as a target the following year. |
|
Until recently Fort Blockhouse or HMS DOLPHIN provided a spiritual and physical home for the Royal Navy's Submarine Service. This short article details the Forts long history
18 pages added or updated in the last 3 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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