Déricourt's first air operation was the night of 17/18 March 1943 when he met two Westland Lysander airplanes landing near Poitiers which delivered four SOE agents and boarded four others to return to England. The operation was successful and his success continued. Over the next eleven months, he supervised 17 air operations in which 22 aircraft landed at more than six different clandestine airfields and delivered 43 SOE agents to France and took 67 back to England. The air operations were also a means of communications between the London headquarters of SOE and its agents in France. Déricourt was the "postman" who collected letter and reports from agents and gave them to the pilots of the airplanes to take back to England. Unlike wireless messages which were always transmitted in code, most of these letters and reports were in clear language although code names were supposed to be used for people and places.