The Catalinas retained the same roles as the Northrops: anti-submarine sweeping, patrol and convoy escort. The aircraft rotated between being based at Reykjavík and at Akureyri. They successfully hit "U-592" on 30 June and "U-580" on 25 August 1942. In December the Norwegian authorities decided to relocate the 330 Sqn. The Akureyri base was immediately ordered to move its aircraft to Reykjavík. Operations of the Catalina had commenced in November and of the Northrops in December. The C-flight continued to operate out of Búðareyri until 11 June 1943. During its period on Iceland the squadron flew 4379 hours, of which 3524 with the Northrops and 855 with Catalinas. Twenty-one soldiers were killed.