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Halcyon-class minesweeper

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HMS Britomart (J22)
HMS Britomart secured to a buoy in Plymouth Sound
Class overview
Operators Royal Navy
Preceded byRacecourse class
Succeeded byBangor class
Subclassesreciprocating / turbine-engined
Planned22
Completed21
Lost9 (+1 constructive total loss)
Retired12
General characteristics for Reciprocating
Typefleet minesweeper
Displacement815 tons (828 tonnes)
Tons burthen1,370 tons (1,391 tonnes)
Length245 ft 9 in (74.90 m) o/aii
Beam33 ft 6 in (10.21 m)
Draught9 ft (2.7 m)[1]
Propulsion2 x Admiralty 3-drum water-tube boilers, vertical compound reciprocating steam engines on 2 shafts, 1,770 ihp
Speed16.5 to 17 kn (31 km/h)
Range7,200 nmi (13,330 km) at 10 knots (19 km/h)
Complement80
Armament
General characteristics (Niger, Salamander)
Tons burthen1,330 tons (1,351 tonnes)
Length245 ft 3 in (74.75 m)
PropulsionVertical triple-expansion, 2,000 ihp
Speed17 knots (31 km/h)
Armament
NotesOther characteristics as per reciprocating ships
General characteristics (turbine)
Displacementlist error: <br /> list (help)
815 - 835 tons (828 - 848 tonnes) /
1,290 - 1,350 tons (1,310 - 1,372 tonnes) full load
Propulsion2 x Admiralty 3-drum water-tube boilers, Parsons steam turbines, 1,750 shp (1,305 kW) on 2 shafts
Speed16.5 knots (31 km/h)
NotesOther characteristics as per Niger / Salamander

The Halcyon class was a class of 21 oil-fired minesweepers (officially, "fleet minesweeping sloops") built for the British Royal Navy between 1933 and 1939. They were given traditional small ship names used historically by the Royal Navy and served during World War II.

Design

There were 21 ships in the Halcyon class, built in two groups; the first using reciprocating steam engines, with steam turbines in the latter. They were generally smaller versions of the Grimsby class escort sloops. Niger and Salamander of the reciprocating group used vertical triple expansion engines, instead of the vertical compound engines of their sisters. As a result of the increased installed power they had a half knot speed advantage, even though they used slightly shorter hulls. The turbine ships used the same shorter hulls as Niger and Salamander, but with lower installed power, speed dropped back to 16.5 knots (31 km/h).

Gleaner, Franklin, Jason and Scott were completed as unarmed survey vessels, Sharpshooter and Seagull being converted to follow suit. They were all re-armed and deployed in their original role on the outbreak of war. Seagull had the first all-welded hull built for the Royal Navy.[2]

Service history

Halcyons served in Home waters, at Dunkirk, on Arctic convoy duty, and in the Mediterranean.

On 3 February 1940 Sphinx (Cdr. J. R. N. Taylor, RN) was sweeping an area 15 miles (24 km) north of Kinnaird Head when attacked by enemy aircraft. A bomb pierced the fo'c'sle deck and exploding destroying the fore part of the ship. She remained afloat and was taken in tow by Halcyon but steadily flooded and capsized and sank. The wreck was later washed ashore north of Lybster and was sold for scrap. The Commanding Officer and forty of the men were killed in the explosion.

Skipjack (Lt.Cdr. F. B. Proudfoot, RN) was attacked and sunk by a force of German dive-bombers off De Panne, Belgium on 1 June 1940. On board Skipjack were between 250 and 300 soldiers just rescued from the Dunkirk beaches during Operation Dynamo. Eye witness William Stone said "she just disappeared".[3]

Halcyons were pressed into service as anti-submarine escorts; this task slowly decreasing as the ships specifically designed for this task, such as Flower class corvettes, came off the slips. Halcyons accompanied most of the Arctic Convoys, serving both as minesweepers and anti-submarine escorts. Several spent extended periods working out of Soviet naval bases in Northern Russia, such as Murmansk. Four Halcyons were lost during this period.

Hebe and Speedy served in the Mediterranean as part of the 14th/17th Minesweeper Flotilla based in Malta. The minesweepers saw action during the Malta Convoys, Operation Torch, and Operation Corkscrew. Hebe was lost to a mine off Bari, Italy on 22 November 1943.

Britomart (Lt. Cdr. Nash, MBE, RNR) and Hussar (Lt.Cdr. A. J. Galvin, DSC, RNR) were sunk by aerial rockets fired from RAF Typhoons in a "friendly fire" incident on 27 August 1944 off Cap d'Antifer, Le Havre. Salamander was badly damaged astern in the same incident and she was written off as a constructive total loss and eventually scrapped without repair. Jason was attacked during the same incident but escaped major damage.

Ships in class

Reciprocating group

Turbine group

See also

References

  1. ^ Specifications Halcyon Minesweepers
  2. ^ Lenton, p.252
  3. ^ BBC NEWS | UK | Surviving WWI: Veterans' stories
  • British and Empire Warships of the Second World War, H. T. Lenton, Greenhill Books, ISBN 1-85367-277-7
  • Warships of World War II, by H. T. Lenton & J. J. Colledge, Ian Allen Ltd, ISBN 0-7110-0202-9
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