Royal Navy

Between 12 January 1941 and 13 April 1945, Aubrietia escorted 85 convoys.^[10]

In 1941, Aubrietia was part of the Atlantic convoy 3rd Escort Group operating out of the port of Greenock.^[11]

On 9 May 1941, Aubrietia was on escort duty as part of Convoy OB-318. Aubrietia picked up one crew member from the SS Esmond, which had been torpedoed by the German submarine U-110. On the same day, she spotted the periscope of the U-110^[12] and depth charged it,^[1] forcing the submarine to surface. This led to the capture of a complete Enigma machine and its codebooks by a boarding party from HMS Bulldog.^{[citation needed]}

After February 1942, she moved to support convoys on the Atlantic run between Freetown, Sierra Leone and Liverpool. On 30 March 1942, Aubrietia picked up some of the survivors from the British merchant ship Muncaster Castle,^[13] which was torpedoed and sunk south-south-west of Monrovia, Liberia.^{[citation needed]}

In November 1942, she was deployed as an escort for assault convoys in the Mediterranean as support of planned allied landings in North Africa (Operation Torch).^{[citation needed]}

From March 1943, Aubrietia convoys was redeployed for defence of convoys during Atlantic passage between Liverpool and Freetown until May 1944. In June 1943, she was transferred to the 41st Escort Group in this role.^{[citation needed]}

In May 1944, Aubrietia was deployed at Gibraltar for patrol and convoy defence of convoys operating between the Mediterranean and Liverpool. On 15 May 1944, Together with HMS Kilmarnock and HMS Blackfly, Aubrietia took part in depth charge and hedgehog attacks on the German submarine U-731 in the Strait of Gibraltar which was sunk with no survivors.^[10]

In June 1944, Aubrietia joined the TG 80.6 Antisubmarine and Convoy Control Group^[14] during planned landings in South France and came under US Navy command. In November 1944, she returned to Royal Navy control and continued as an escort for Atlantic convoys between Freetown, the Mediterranean and Liverpool, until April 1945.^{[citation needed]}

Fate

Following VE day, Aubrietia was placed on the Disposal List and was sold in 1948 to Kosmos, a Norwegian company, for use as a mercantile buoy tender. Aubrietia was renamed Arnfinn Bergan. Arnfinn Bergan was converted to a whale catcher in 1951, and remained in service until laid up in Sandjeford, Norway and was scrapped in Grimstad, Norway in December 1966.^[15]