The squadron was reformed from 'G' flight at RAF Bowmore, Strathclyde on 13 March 1941, as part of No. 15 Group of Coastal Command. The unit was equipped with the three Short G class and two Short C class (Clio and Cordelia) flying boats, re-equipping with the Catalina Mk.Ib in June 1941.
On March 13, 1941, a squadron was formed at RAF Bowmore, Strathclyde, from 'G' flight, becoming part of No. 15 Group of Coastal Command. The squadron initially operated Short G and C class flying boats (Clio and Cordelia), later switching to the Catalina Mk.Ib in June 1941.