Grampus class submarine
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| Class overview | |
|---|---|
| Name: | Grampus-class submarine |
| Preceded by: | River class |
| Succeeded by: | T class |
| Completed: | 6 |
| Lost: | 5 |
| Retired: | 1 |
| General characteristics | |
| Type: | Submarine |
| Displacement: |
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| Length: | 289 ft (88 m) (Porpoise), 293 ft (89 m) (others) |
| Beam: | 29 ft 10 in (9.09 m) (Porpoise), 25 ft 6 in (7.77 m) (others) |
| Draught: | 15 ft 10 in (4.83 m) (Porpoise), 16 ft 10 in (5.13 m) (others) |
| Propulsion: | 2 shaft, Diesel (3300 hp) plus electric (1630 hp) |
| Speed: |
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| Complement: | 59 |
| Armament: |
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The Grampus-class submarines were a group of minelaying submarines built for the Royal Navy in the late 1930s. These boats are sometimes referred to as the Porpoise class from the single prototype, HMS Porpoise built in 1932. Five boats to a modified design were built between 1936 and 1938. The ships were all named after marine mammals.
The mines were stored in a special "gallery" with a conveyor belt built into the outer casing as pioneered by the converted M-class submarine HMS M3. These boats were of a saddle tank type.
Boats of this class were used extensively in the Mediterranean, particularly to supply the besieged island of Malta in a service nicknamed the "magic carpet".
Only one, HMS Rorqual, survived the war.
Coordinates: 37°05′N 17°30′E / 37.083°N 17.500°E
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Wikipedia