 Based on their confidence in the Enigma machine, as well as the testimony of a captured British bomber pilot, the Germans came to the erroneous conclusion that the Allies could detect emissions produced by the Metox itself.The executive officer of "U-230", Captain Herbert Werner said of Metox, "Then, on August 3 [1943], we received a message from Headquarters which had a greater impact on our lives than any since the beginning of the Allied offensive.Metox was eventually countered by a version of the 10 centimetre H2S radar, which Metox could not detect and once again the Leigh light forced U-boat crews to refuse to run surfaced at night.