AI Mk. IV
... that the AI Mk. IV, the first air-to-air radar, was developed under conditions that "would have caused a riot in a prison farm"?
... that the <b id="mwBUM"><a class="mw-redirect" href="./AI_Mk._IV_radar" id="mwBUQ" rel="mw:WikiLink" title="AI Mk. IV radar">AI Mk. IV</a></b>, the first air-to-air radar, was developed under conditions that "would have caused a riot in a prison farm"?