Allied Warships

HMS St. Cathan (FY 234)

ASW Trawler

NavyThe Royal Navy
TypeASW Trawler
Class[No specific class] 
PennantFY 234 
Built byCook, Welton & Gemmill (Beverley, U.K.) 
Laid down 
Launched19 Aug 1936 
CommissionedNov 1939 
Lost11 Apr 1942 
Loss position33° 09'N, 78° 16'W

Completed on 2 October 1936.
Taken over by the Admiralty in September 1939.
Displacement: 565 tons.
Armament: 1 4" gun.

Lent to the United States Navy in February 1942 to operate of the US East coast under USN control.

HMT St. Cathan (Lt. John Mackay, RNR) was sunk in a collision with the Dutch merchant Hebe south-south-east of Little River, South Carolina, U.S.A. in position 33.09'N, 78.16'W.


Commands listed for HMS St. Cathan (FY 234)

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.

1Ch.Skr. Charles William Freer, RNR1 Nov 193927 Mar 1940
2T/Lt. Frederick Twomey, RNR27 Mar 194012 Jun 1941
3Lt. John Mackay, RNR12 Jun 194111 Apr 1942

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Notable events involving St. Cathan include:

1 Feb 1941
HMS L 27 (Lt. H.N. Edmonds, DSC, RN) conducted A/S exercises off Dartmouth, first with HMS St. Cathan (T/Lt. F. Twomey, RNR) and HMS Cape Comorin (T/Lt. N.L. Brown, RNVR) and later with ML 157, ML 157, ML 160 and ML 166. (1)

20 Feb 1941
HMS L 27 (Lt. H.N. Edmonds, DSC, RN) conducted A/S exercises off Dartmouth with HMS Ruby (T/Lt. N.L. Brown, RNVR) and HMS St. Cathan (T/Lt. F. Twomey, RNR). (2)

29 Mar 1941
HMS H 32 (Lt. B.G. Heslop, DSC, RN) departed Dartmouth for her 3rd war patrol. She wa ordered to patrol in the Bay of Biscay. H 32 was escorted out by HMS St. Cathan (T/Lt. F. Twomey, RNR). (3)

21 Nov 1941
HMS H 50 (Lt. E.T. Stanley, RN) conducted A/S exercises off Lough Foyle with HMS St. Cathan (Lt. J. Mackay, RNR). (4)


  1. ADM 173/16805 + ADM 199/658
  2. ADM 173/16805 + ADM 199/655
  3. ADM 199/1828
  4. ADM 173/16795

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

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