Allied Warships

HMS Cosby (K 559)

Frigate of the Captain class

NavyThe Royal Navy
PennantK 559 
Built byBethlehem-Hingham Shipyard Inc. (Hingham, Massachusetts, U.S.A.) 
Ordered10 Jan 1942 
Laid down11 Aug 1943 
Launched20 Oct 1943 
Commissioned20 Dec 1943 
End service 

Assigned USN penant DE 94 but not named.

Returned to the USN on 5 January 1946. Scrapped.

Former nameDE 94

Commands listed for HMS Cosby (K 559)

Please note that we're still working on this section
and that we only list Commanding Officers for the duration of the Second World War.

1T/A/Lt.Cdr. Richard Sinclair Connell, RNR18 Dec 194320 Aug 1944
2Lt. Lester Allan Pepperell, RN20 Aug 1944late 1945

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Notable events involving Cosby include:

30 Mar 1944
Around 2100A/30, HMS Nelson (Capt. A.H. Maxwell-Hyslop, AM, RN) departed Greenock for Rosyth where she arrived around 1045A/1. At Rosyth she is to be taken in hand for exchanging the gun barrels of her main and secondary armament. On leaving the Clyde she is joined by the frigates HMS Cosby (T/A/Lt.Cdr. R.S. Connell, RNR), HMS Cubitt (Lt. G.D. Gregory, RN) and HMS Curzon (Lt. A.A. Diggins, DSC, RN).

Around 1245A/31, the frigates HMS Byron (Lt. K.G.L. Southcombe, RN) and HMS Rutherford (Lt. J.G. Brookes, DSC, RN) also joined coming from Aultbea.

after having parted company with the battleship off Rosyth the frigates continued on towards Sheerness where they arrived on 2 April. (1)

8 May 1945
HMS Cosby was the first ship to liberate the Channel Island Jersey. (2)

21 Aug 1945
HMS Upshot (Lt. A.J. Boyall, RN) conducted A/S exercises off Plymouth with HMS Holmes (T/A/Lt.Cdr. P.S. Boyle, RNVR), HMS Cosby (Lt. L.A. Pepperell, RN) and HMS Conqueror (T/A/Lt.Cdr. S.R. Brown, RNVR). (3)

Media links

The Captain Class Frigates in the Second World War

Collingwood, Donald


  1. ADM 53/120126 + ADM 53/120127
  2. Personal communication
  3. ADM 173/20194

ADM numbers indicate documents at the British National Archives at Kew, London.

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