HMS Amphion (1911)
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Amphion about 1914 | |
| History | |
|---|---|
| Name | Amphion |
| Ordered | 1910 Naval Programme |
| Builder | Pembroke Dockyard |
| Laid down | 15 March 1911 |
| Launched | 4 December 1911 |
| Completed | March 1913 |
| Fate | Sunk by mine, 6 August 1914 |
| General characteristics (as built) | |
| Class & type | Active-class scout cruiser |
| Displacement | 3,340 long tons (3,390 t) (normal) |
| Length | 405 ft (123.4 m) (o/a) |
| Beam | 41 ft (12.5 m) |
| Draught | 14 ft 6 in (4.4 m) |
| Installed power |
|
| Propulsion | 4 × shafts; 2 × steam turbine sets |
| Speed | 25 knots (46 km/h; 29 mph) |
| Range | 4,630 nmi (8,570 km; 5,330 mi) at 10 knots (19 km/h; 12 mph) |
| Complement | 293 |
| Armament |
|
| Armour |
|
HMS Amphion was an Active-class scout cruiser built for the Royal Navy before the First World War. Completed in 1913, she was initially assigned to the First Fleet and became a destroyer flotilla leader in mid-1914. When the war began, her flotilla was assigned to the Harwich Force. While patrolling on the first full day of the war, Amphion and her destroyers encountered and sank a German minelayer, SMS Königin Luise, but not before she had laid many of her mines. While returning from patrolling the following morning, Amphion struck a mine on 6 August 1914 off the Thames Estuary and sank with the loss of 132 crewmen killed. She was the first ship of the Royal Navy to be sunk in the First World War. The wreck site is protected and may not be dived upon without permission from the Ministry of Defence.
The Active-class ships were the last class of turbine-powered scout cruisers ordered by the Admiralty. These ships were intended to work with destroyer flotillas, leading their torpedo attacks and backing them up when attacked by other destroyers, although they quickly became less useful as destroyer speeds increased before the First World War. Amphion had a length between perpendiculars of 405 feet (123.4 m), a beam of 41 feet (12.5 m) and a draught of 14 feet 6 inches (4.4 m). She displaced 3,340 long tons (3,394 t) at normal load and 3,945 long tons (4,008 t) at deep load. Her crew consisted of 289 officers and ratings.[1]
The main armament of the Active class consisted of ten breech-loading (BL) 4-inch (102 mm) Mk VII guns. The forward pair of guns were mounted side by side on a platform on the forecastle, six were amidships, three on each broadside, and the two remaining guns were on the centreline of the quarterdeck, one ahead of the other.[2] The guns fired their 31-pound (14 kg) shells to a range of about 11,400 yards (10,400 m).[3] Her secondary armament was four quick-firing (QF) three-pounder 1.9 in (47 mm) Vickers Mk I guns and two submerged 18-inch (450 mm) torpedo tubes.[4]
As scout cruisers, the ships were only lightly protected to maximise their speed. They had a curved protective deck that was one inch (25 mm) thick on the slope and 0.5 inches (13 mm) on the flat.[5] Their conning tower was protected by four inches of armour.[4]


