After working up at Tobermory, Annan joined escort group EG 6 at Londonderry. With this group she patrolled and escorted convoys in coastal waters around the United Kingdom. On 16 October 1944 while on patrol, EG 6 encountered the German submarine U-1006 south of the Faroe Islands.[4] Forced to surface, the submarine was sunk by Annan by depth charge.[3][5]Annan rescued forty-six survivors from the U-boat.[3]
In April 1945, the group EG 6 was transferred to Halifax, Nova Scotia.[3] However the following month, Annan returned to the United Kingdom and was handed back to the Royal Navy at Sheerness on 20 June 1945.[3][5]
Post-war service
Annan was sold to the Royal Danish Navy on 22 November 1945 as one of two River-class frigates. The two ships were renamed the Holger Danske class.[6][Note 1]Annan was renamed Niels Ebbesen for the Danish squire Niels Ebbesen. She was used as a training ship for naval cadets, carrying up to 90 trainees.[7]Niels Ebbesen went through several refits during her service with the Royal Danish Navy.[7] She was decommissioned on 8 May 1963[7] and broken up that year at Odense, Denmark.[3]
Macpherson, Ken; Barrie, Ron (2002). Warships of Canada's Naval Forces 1910–2002 (3 ed.). St. Catharines: Vanwell Publishing Ltd. p. 97. ISBN1-55125-072-1.
Rohwer, Jürgen (2005). Chronology of the War at Sea 1939–1945: The Naval History of World War Two (Third Revised ed.). Annapolis, Maryland: Naval Institute Press. ISBN1-59114-119-2