RAF Castle Archdale was located on the eastern shore of Lower Lough Erne, near the village of Lisnarick.

From Castle Archdale, Consolidated Catalinas and Short Sunderlands could patrol the North Atlantic for German U-boats.

A secret agreement with the government of Ireland allowed aircraft to fly from Lough Erne to the Atlantic along the Donegal Corridor.

In May 1941 the German battleship Bismarck was found during a routine patrol by a Catalina flying out of Castle Archdale boat base on Lower Lough Erne, Northern Ireland.

The following units were here at some point:[5] A flag lowering ceremony was conducted in late 1957, and the airfield finally closed on 31 January 1958.