HMS Halcyon (J42)
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| History | |
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| Class and type: | Halcyon-class minesweeper |
| Name: | HMS Halcyon |
| Builder: | John Brown Shipbuilding & Engineering |
| Laid down: | 27 March 1933 |
| Launched: | 20 December 1933 |
| Commissioned: | 18 April 1934 |
| Identification: | Pennant number: J42 |
| Fate: | Sold for scrapping on 19 April 1950 |
| General characteristics | |
| Class and type: | Halcyon-class minesweeper |
| Displacement: |
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| Length: | 245 ft 9 in (74.90 m) o/a |
| Beam: | 33 ft 6 in (10.21 m) |
| Draught: | 8 ft 3 in (2.51 m) |
| Installed power: |
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| Propulsion: |
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| Speed: | 16.5 knots (30.6 km/h; 19.0 mph) |
| Range: | 7,200 nmi (13,300 km; 8,300 mi) at 10 knots (19 km/h; 12 mph) |
| Complement: | 157 |
| Armament: |
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HMS Halcyon was the lead ship in her class of minesweepers built for the Royal Navy in the 1930s.
The Halcyon class designed as a replacement for the preceding Hunt class and varied in size and propulsion. Halcyon displaced 815 long tons (828 t) at standard load and 1,370 long tons (1,390 t) at deep load. The ship had an overall length of 245 feet 9 inches (74.9 m), a beam of 33 feet 6 inches (10.2 m) and a draught of 8 feet 3 inches (2.5 m).
She was powered by two vertical compound-expansion steam engines, each driving one shaft, using steam provided by two Admiralty three-drum boilers. The engines produced a total of 1,770 shaft horsepower (1,320 kW) and gave a maximum speed of 16.5 knots (30.6 km/h; 19.0 mph). Halcyon carried a maximum of 243 long tons (247 t) of fuel oil that gave her a range of 7,200 nautical miles (13,300 km; 8,300 mi) at 10 knots (19 km/h; 12 mph). The ship's complement consisted of 80 officers and ratings.
Halcyon was armed with two QF 4-inch (10.2 cm) guns; the forward gun was in a high-angle mount while the aft gun was in a low-angle mount. She was also equipped with eight .303-inch (7.7 mm) machine guns. Later in her career, the rear 4-inch gun mount was removed as were most of the .303 machine guns, one quadruple mount for Vickers .50 machine guns was added as were up to four single or twin mounts for 20 mm Oerlikon anti-aircraft guns. For escort work, her minesweeping gear could be exchanged for around 40 depth charges.
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