The first formation of No. 242 Squadron RAF was on 15 August 1918 from numbers 408, 409 and 514 Flights at the seaplane station at Newhaven, Sussex. Operating from there and the nearby airfield at Telscombe Cliffs, it was equipped with Short Type 184 seaplanes and carried out anti-submarine patrols over the English Channel until the end of the First World War.