Trainees listened through headphones to recordings containing expressions such as 'Bakugeki junbi taikei tsukure' (Take up formation for bombing). At the end of each course he sent a report to Bletchley Park commenting on the abilities of each trainee. The trainees were mostly posted to India and played a vital role during the long Burma Campaign giving warning of bombing raids, and a few of them were undertaking similar duties on ships of the Royal Navy during the last year of the war.
Trainees listened to recordings of phrases like 'Take up formation for bombing' through headphones. The instructor sent reports to Bletchley Park evaluating each trainee's abilities. Trainees were primarily stationed in India and played a crucial role during the Burma Campaign by warning about bombing raids, with some also working on ships of the Royal Navy towards the end of World War II.