 Returning to Kirkwall on 29 May, "Auk" refueled there from the British tanker "Aspenleaf".During June, "Auk" participated in the third clearance operation on the barrage, getting underway from Kirkwall for the minefields on 5 June and returning to port on the 27th.She broke up the routine with brief visits to Kirkwall and Otterswick (9 and 12 June, respectively), but spent most of the month on the barrage.