Halcyon-class minesweeper

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 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 .

''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.Lenton, p.252

Service history

''Halcyon''s served in Home waters, at Dunkirk.

On 3 February 1940 (Cdr. J. R. N. Taylor, RN) was sweeping an area 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.

(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. Eyewitness William Stone said "she just disappeared".

''Halcyon''s were pressed into service as anti-submarine escorts; this task slowly decreasing as the ships specifically designed for this task, such as s, came off the slips. ''Halcyon''s 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 ''Halcyon''s were lost during this period.

* (Lt.Cdr. T. C. Crease), having escorted the very first Arctic convoy, attacked a German U-boat while escorting Convoy PQ 11, and helped rescue the crew of the cruiser . ''Gossamer'' was dive-bombed and sunk on 26 June 1942 in the Kola Inlet.
* (Cdr. A. J. Cubison, DSC and Bar) was lost off Iceland on 5 July 1942 while escorting Convoy QP 13, when part of the convoy wandered into a British minefield.
* was torpedoed and sunk in the Greenland Sea on 29 September 1942 while escorting Convoy QP 14.
* On 31 December 1943 during the Battle of the Barents Sea, was attacked by the German heavy cruiser while escorting Convoy JW 51B. After sustaining serious damage, ''Bramble'' was finished off by the German destroyer ''Eckoldt''.

and served in the Mediterranean Sea 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.

Friendly fire losses

As the Allied armies advanced following the invasion of Normandy, , , and were assigned to the 1st Minesweeping Flotilla (1MF) clearing Axis minefields north of Normandy to open additional ports to supply the advance. On the afternoon of 27 August 1944, they were sweeping off Cap d'Antifer in preparation for the battleship and monitors and to engage Le Havre coastal artillery delaying the advance of Canadian troops.

The headquarters officer assigning the minesweeping project to 1MF neglected to inform the Flag Officer British Assault Area ( Rear‑Admiral Rivett‑Carnac), who was responsible for defending the invasion beaches from E-boats operating out of Le Havre. 1MF was observed on a southwesterly leg of the minesweeping operation and assumed to be German ships proceeding to attack Allied shipping off the invasion beaches. The Admiral's staff requested No. 263 Squadron RAF and No. 266 Squadron RAF to attack the presumed enemy ships. The squadrons responded with 16 Typhoons armed with 20 mm cannon and High Explosive "60 lb" RP-3 unguided rockets. RAF pilots identified 1MF as probably friendly shipping, but upon questioning their orders were told the Royal Navy had no ships in the area.

In a well-executed attack out of the sun at 13:30, the Typhoons sank ''Britomart'' (Lt. Cdr. Nash, MBE, RNR) and ''Hussar'' (Lt.Cdr. A. J. Galvin, DSC, RNR); and ''Salamander'' was damaged so far beyond economical repair she was written off as a constructive total loss. Eighty-six British sailors were killed and 124 more were injured. 1MF identified the Typhoons as friendly, and poor visibility into the sun prevented early recognition of the impending "friendly fire". ''Jason'' established radio contact to terminate the attack.

Ships in class

Reciprocating group

*Ordered 1932
** HMS ''Halcyon'', built by John Brown & Company, Clydebank, sold for scrapping 1950
** HMS ''Skipjack'', built by John Brown, bombed and sunk off Dunkirk

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