From 25 October to 12 November, "Syrtis" conducted a patrol off Norway but did not sight any potential targets. After conducting additional training, the submarine conducted an anti-submarine patrol off Norway on 22 December, protecting the Arctic convoys JW 55B, RA 55A and RA 55B. The patrol was uneventful, and the boat returned to Lerwick, Scotland, on 6 January.