Predannack's location made it suitable for emergency landings, particularly with the growth of the bomber offensive against mainland Europe. Many RAF Bomber Command and US Eighth Air Force aircraft found haven at the base. As a result, the RAF agreed to extend the runways in 1943 for larger aircraft, including Vickers Wellington and Consolidated Liberator aircraft for anti-submarine warfare. This enabled Predannack to be a staging and departure point for aircraft en route to the North African Campaign. Late in 1942 some of the 67th TCG's Douglas C-47 Skytrains and the 81st Fighter Group's Bell P-39 Airacobras refuelled here before flying around the Iberian Peninsula.