The Catalina was an excellent aircraft, and it was the third highest scoring ASW aircraft with 34 credited U-boat kills, but the greatest ASW aircraft without doubt, was the Consolidated B-24 Liberator with 72 credited U-boat kills.Glider said:The role I was thinking of was the long range maritime recce / Anti Sub role. It was clearly the best on the allied side serving with UK/USA/Russia and built in Russia with or without US approval. I simply cannot think of any Axis aircraft that comes close.