Allied Warships

HMS Mermaid (U 30)

Sloop of the Modified Black Swan class

NavyThe Royal Navy
ClassModified Black Swan 
PennantU 30 
Built byWilliam Denny & Brothers (Dumbarton, Scotland) 
Ordered11 Feb 1942 
Laid down8 Sep 1942 
Launched11 Nov 1943 
Commissioned12 May 1944 
End service 

Sold to the West German Navy on 5 May 1959.
Scrapped in 1990.


Commands listed for HMS Mermaid (U 30)

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1Lt.Cdr. John Pemberton Mosse, RN2 Apr 1944Sep 1945
2Lt.Cdr. John Townshend Kimpton, DSC, RNSep 1945

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Notable events involving Mermaid include:

30 May 1944
HMS H 50 (T/Lt. A.F. Wicker, RNVR) conducted A/S exercises off Campbeltown with HMS Mermaid (Lt.Cdr. J.P. Mosse, RN) and HMS Radiant (T/Lt. C.S.R. Shapland, RNVR). (1)

6 Jul 1944
HMS Shakespeare (Lt. D. Swanston, DSC and Bar, RN) conducted A/S exercises with HMS Mermaid (Lt.Cdr. J.P. Mosse, RN), HMS Hamlet (T/Lt. J.C. Boyd, RNVR) and HMS Graemsay (A/Skr.Lt. A.R. Lewis, RNR). (2)

24 Aug 1944
German U-boat U-354 was sunk in the Barents Sea north-east of North Cape, in position 72°49'N, 30°41'E, by depth charges from the British sloop HMS Mermaid (Lt.Cdr. J.P. Mosse, RN) and the British frigate HMS Loch Dunvegan (Cdr. E. Wheeler, RD, RNR).

2 Sep 1944
German U-boat U-394 was sunk in the Norwegian Sea some nautical miles south-east of Jan Mayen island, Norway, in position 69°47'N, 04°10'E, by rockets and depth charges from a Swordfish aircraft (Sqdn. 825) from the British escort carrier HMS Vindex (Capt. H.T.T. Bayliss, RN), and the British destroyers HMS Keppel (Cdr. I.J. Tyson, DSO, DSC, RNR) and HMS Whitehall (Lt.Cdr. P.J. Cowell, DSC, RN) and the British sloops HMS Mermaid (Lt.Cdr. J.P. Mosse, RN) and HMS Peacock (Lt.Cdr. R.B. Stannard, VC, DSO, RNR).


  1. ADM 173/18528
  2. ADM 173/18719

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

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